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Frequently Asked Questions
To prevent damage in shipping, please review the Step-By-Step tutorial for proper packaging instructions for your rifle.
Unfortunately, the last physical catalog was offered in 2018, and we currently do not produce or ship physical catalogs. You can view all of our current production firearms our website, and you can view the last produced Weatherby Catalog via the link below.
View Previous Catalog
This article highlights the Accuracy Guarantee corresponding to the specific serial number prefixes of rifles produced by Weatherby. Note: Not all prefixes fall under the current Sub-MOA Accuracy Guarantee.
Currently, Weatherby guarantees Sub-MOA accuracy within Two-Years of Verified Purchase Date to the Original Purchaser of the firearm. This applies to all Weatherby® Mark V® rifles with a serial number prefix of “WY, PM and PS”, Model 307™ rifles with a prefix of "AW", and Vanguard® Series 2 rifles with a serial number prefix of “VB”. These rifles are guaranteed to shoot a .99″ or better 3-shot group at 100 yards from a cold barrel when used with premium (non-Weatherby calibers) or Weatherby factory ammunition, once optimal load has been determined within Two-Years of the Verified Purchase Date, to the Original Purchaser only.
All other Mark V® rifles with a 5 digit numeric number, B, C, H, M, P, S, AB, AS, BP, BW, PB, SB, SS, SW, WB, WS, as well as all other Vanguard® rifles with serial numbers beginning with V, VL, VS, or VX, are guaranteed to shoot a 1 1⁄2” or better 3-shot group at 100 yards from a cold barrel when used with premium (non-Weatherby calibers) or Weatherby® factory ammunition within Two-Years of Verified Purchase Date to the Original Purchaser.
WOOD stocks have a torque specification of 35-inch pounds.
SYNTHETIC stocks without an aluminum bedding block have a torque specification of 35-inch pounds.
SYNTHETIC stocks with aluminum pillars have a torque specification of 55-inch pounds.
HAND-LAID FIBERGLASS (composite) stocks with aluminum bedding block have a torque specification of 55-inch pounds.
CARBON FIBER stocks with aluminum pillars have a torque specification of 55-inch pounds.
The correct assembly procedure is:
- Apply a small amount of blue (non-permanent) thread locking compound to the threads of both trigger guard screws.
- With a screwdriver of the proper size, lightly tighten both trigger guard screws.
- Grasp the barrel and pull it to the rear to seat the barrel and receiver properly in the stock, with the barrel centered in the channel of the stock's forend.
- Tighten the front trigger guard screw first to 35-inch pounds, followed by the rear screw, also to 35 inch pounds. (This is the final torque value for wood and synthetic stocks, as over-torquing can damage the stock itself.)
- For composite stocks with aluminum bedding blocks and carbon fiber or synthetic stocks with aluminum pillars, apply additional torque of 55 inch pounds to the front screw followed by 55 inch pounds to the rear screw.
Assembling your Weatherby rifle following this method will ensure a proper fit between the receiver and its bedding within the stock as well as create proper positioning of the barrel within the barrel channel.
On Our Mark: Episode 11 - Barrel Break-In
Barrel break-in can be performed through a number of different procedures. It is important to note that our testing shows that not all barrels require the same amount of break-in. Many of our Weatherby rifles get close to their accuracy potential during break-in but accuracy continues to improve with more shooting.
We suggest a 20 shot break-in, utilizing two different factory loads (load 1 and load 2) to begin understanding desired barrel accuracy. If desired, after the break-in, begin experimental shooting with different factory loads as each barrel's accuracy is dependent on load and bullet combinations.
Our procedure is as follows:
- Clean the barrel*
- Fire 3 shots (Load 1)
- Clean the barrel*
- Fire 3 shots (Load 2)
- Clean the barrel*
- Fire 3 shots (Load 1)
- Clean the barrel*
- Fire 3 shots (Load 2)
- Clean the barrel*
- Fire 3 shots (Load 1)
- Let Barrel Cool
- Fire 5 shots (Load 2)
- Clean the Barrel*
*Recommended Bore Cleaning Procedure:
- Run several patches with bore cleaner/copper solvent down the barrel
- Brush the barrel with at least 10 strokes
- Run 2 patches soaked in bore cleaner/copper solvent
- Brush the barrel with at least 5 strokes
- Run patches soaked in bore cleaner/copper solvent through until patches come out clean
- Run 2 dry patches through the barrel
- Run a small amount of lubricant through the barrel before storage
wo different safe companies manufactured Weatherby safes. Contact information is as follows:
American Security
www.amsecusa.com
11925 Pacific Avenue
Fontana, CA 92337
(951) 685-9680
Serial # prefix- GS and KS
Fort Knox
www.ftknox.com
993 North Industrial Park Way
Orem, UT 84057
(801) 224-7233
Most production Weatherby® Mark V rifles can be made in left handed configurations, both in 9 Lug Magnum and 6 Lug Standard offerings. For more information, please click the following link to view our current Mark V line up for production made left hand rifles, or you can build a left handed rifle on our Custom Configurator at the bottom link. Please note however, that some models are only available in right handed options.
Vanguards and Model 307 rifles only come in right handed platforms, and cannot be made in a left-hand model.
If you have any additional questions, feel free to call customer service at (307)-675-7840.
No. Weatherby has not offered any service work on other products since 1994.
We have found through our testing that barrels having a smaller outside diameter than our #3 contour require upward pressure to help stabilize the barrel for increased accuracy. Our free floated barrels have enough rigidity in the barrel for them to be free floated.
Weatherby recommends the following Bore Guides:
Stoney Point XL Bore Guide
MTM for calibers .25 to .378. (Commonly found on Midway USA)
Possum Hollow Rimfire Bore Guide (for Mark XXII Models)
The link below is to an outstanding article on triggers by Steve Jenkins at Real Gun Reviews. It specifically discusses “handgun triggers” and we know sporting rifle triggers do not come in double action, DA/SA etc. None-the-less, the premise and definitions of all the elements (take-up, creep, break, overtravel, etc.) is applicable to rifles. We’ve yet to find better information anywhere on this subject and should answer all your questions and solve the mystery of triggers. Enjoy!
The first of its kind, 3D Hex recoil pads have been specifically designed for lightweight magnum recoil absorbing performance. The pad is intended to compress and dampen recoil instead of immediately springing back against the user like a traditional rubber recoil pad. By design, the 3DHex Recoil reducing pad is stiffer on the top and bottom and is softest in the middle of the pad where there is maximum shoulder contact. The result is reduced muzzle lift and more comfortable shooting experience. If a rifle with the 3D Hex Recoil Pad is left resting in the vertical position (in a gun safe or in a retail display) with the recoil pad resting on a hard surface the pad can begin to compress. Do not be alarmed, the pad will return to its original shape with some time. Weatherby recommends displaying rifles with the 3D Hex recoil pad in a horizontal position and muzzle down in a gun safe.
Yes, Triggertech triggers are available aftermarket to consumers for purchase. For warranty purposes, they must be installed by Weatherby or a Weatherby Authorized Service Center. The price is $225 Installed, which includes the Trigger at $200.00 MSRP. For the warranty of the rifle to be intact, the trigger must be purchased through and installed by Weatherby, as Weatherby cannot guarantee the safety or function of any trigger (Triggertech or otherwise) installed by a non-Weatherby gunsmith.
No. Components are not interchangeable between the Mark V and the Vanguard.
Serial Number Prefix – Model / Country of Origin : (Years of Production)
No Prefix -Mark V® (USA) PFI : (1958 -1959)
No Prefix – Mark V® (Germany) : (1959 – 1973)
H – Mark V® (Japan) : (1972 – 1994)
M – Mark V® Silhouette Pistol : (1980 – 1981)
P – Mark V® JPS (Germany) : (1964 – 1973)
S – Mark V® (Japan) : (1972 – 1994)
S0 – Mark V® Varmint Master (Japan) : (1980 – 1981)
S1- JPS Mark V Varmint Master : (1964-1973)
Mark V® (USA)
AB – Mark V® Std. Caliber – 6 Lug Receiver : (1996 – 1998)
AS – Mark V® Std. Caliber – 6 Lug Receiver : (1996 – 1998)
BP – Mark V® Std. Caliber – 6 Lug Receiver : (2004-2015)
BW – Mark V® Magnum – 9 Lug Receiver : (2002 – 2004)
PB – Mark V® Magnum– 9 Lug Receiver : (2004 – 2012)
PM – Mark V® Magnum– 9 Lug Receiver : (2015-2019)
PS – Mark V® Std. Caliber – 6 Lug Receiver : (2015-2019)
SB – Mark V® Magnum – 9 Lug Receiver : (1995 – 2004)
SS – Mark V® Magnum – 9 Lug Receiver : (1994 – 2002)
SW – Mark V® Magnum – 9 Lug Receiver : (2002 – 2004 )
WB – Mark V® Std. Caliber – 6 Lug Receiver : (1998 – 2004)
WS – Mark V® Std. Caliber – 6 Lug Receiver : (1998 – 2004)
WY – Mark V® Magnum – 9 Lug Receiver : (2019-)
WY – Mark V® Std. Caliber – 6 Lug Receiver : (2019-)
If you are looking for a more specific date, please contact our Customer Service with your serial number. Our Contact Us page can be found at the following link:
The bolt diameter for the Mark V 9 lug bolt is .842.
The bolt diameter for the Mark V® 6 lug bolt is .706.
Mark V barrel threads are 1-1/16-16, UNA – 3A
No.
The Model 307™ rifles use Stiller / Savage style 2 piece mounts, which utilizes 8-40 thread receiver mounting screws.
***NOTE***: The distance between the front and rear scope mount holes on the Savage 110 receivers are a different length than the Model 307 receivers, and Picatinny rails made for the Savage 110 are not compatible with the Model 307. We recommend the Peak 44 J-rail if you are seeking a picatinny rail option.
Unfortunately, we do not have any left handed offerings in the Model 307™.
The Model 307™ is Weatherby's take on the 700 platform. Development and design were done by the Weatherby engineering and product development teams. We tooled up an outside machine shop to help ensure we can get the volume of Model 307's in the hands of consumers, but Weatherby does some machining and all of the finishing work on the Model 307™. Our QC team checks every action at multiple steps in the manufacturing and assembly process.
We also use USA made rifled barrel blanks and contour, thread, flute, chamber, and finish our barrels right here in Sheridan, WY.
Model 307™ rifles are categorized into Long and Short Action, based on cartridge length.
Short Action:
- 243 Win
- 6.5 Creedmoor
- 308 Win
Long Action:
- 240 Wby Mag
- 257 Wby Mag
- 6.5 PRC
- 6.5 RPM
- 6.5-300 Wby Mag
- 270 Win
- 270 Wby
- 7mm Rem Mag
- 7mm PRC
- 280 AI
- 28 Nosler
- 30-06 Sprg
- 300 PRC
- 300 Win Mag
- 300 Wby Mag
You can locate aftermarket AICS compatible magazines through multiple companies, but we would recommend looking with Magpul and MDT to start your search.
No, the tension on the safety is set by TriggerTech, cannot be modified without voiding the warranty on the trigger.
All Model 307™ actions are compatible with 700 platform drop in triggers. If the trigger you are wanting to install is compatible with a 700 platform firearm, it should work with your Model 307™. That being said, you should always verify the functionality of the trigger and the safety prior to use with live ammunition.
Model 307™ triggers can be adjusted by tightening or loosening the trigger set screw, located just in front of the trigger. They are adjustable from 5 lbs down to 2.5 lbs, typically leaving the factory between 3-3.5 lbs. We recommend following the instructions set forth by TriggerTech for these adjustments.
No, parts from the Model 307™ are NOT interchangeable with the Mark V and Vanguard rifles.
The barrels used on the Model 307™ rifles are button rifled and they also carry the same Sub-MOA guarantee as the Mark V and Vanguard rifles.
Yes, the models using the MDT chassis system are free floated. Some contact may occur on the stock channel in the Range XP Model, however this will not affect the accuracy or performance of the rifle.
No, the break in procedure is the same for the Model 307™ and the Mark V and Vanguard.
On the Alpine CT & Adventure SD the stocks are bedded from the factory.
On the Range XP, Alpine MDT models & HUSH the stocks are NOT bedded from the factory.
The bolt handle threads on the Model 307™ are 5/16”-24.
How To: Take Apart the Model 307 Bolt
Also refer to the owner's manual for step by step instructions for disassembly and reassembly of the Model 307™ bolt.
The Model 307™ has a 90° bolt throw.
The receiver thread pitch is 1-1/16-16 UN 3A and is .880” long, and is recommended to torque to 70 ft lbs, or to the recommended torque provided from your barrel manufacturer.
Short Action : .470”
Long Action, Standard Face - .470”
Long Action, Magnum Face - .540”
We would recommend viewing the following website to reference the bolt diameter necessary for given cartridges: https://www.loaddevelopment.com/bolt-face-action-database/
Adventure SD, Alpine MDT, HUSH, and Range XP models will have ½”-28 threads.
Alpine MDT Carbon and Alpine CT will have 5/8" -24 threads.
It is most common to experience issues with magazines if they are not seated properly in the magazine well. It is possible on the Model 307 to insert the magazine but not have it latched completely.
When inserting your magazine into a Weatherby Model 307 ensure you are pushing up on the magazine from the rear portion of the magazine base plate. When doing so with moderate pressure, you will hear a distinct, audible click of the magazine catch on the magazine. If looking carefully at the latch itself, you will see the latch move slightly around the magazine catch and back into its locked resting position. After such a click is heard, give your magazine a slight pull away and downward from the firearm to ensure it is properly locked into place. If you push on or even smack the magazine on the front portion in an effort to insert your magazine, you may hear a metallic clang of the magazine impacting the receiver, however it may not be latched properly, and could be held slightly in place by the spring tension of the magazine latch, and NOT the latch itself.
The best practice is to insert the magazine firmly upward on an open bolt, using hand pressure only, with your hand on the rear half of the magazine base plate. This will ensure pressure upward moves the magazine into its proper place.
If this procedure does not remedy the issue, please contact Weatherby Customer Service for more information and assistance.
We recommend using the Peak 44 JRail Picrail
Vanguard rifles are categorized into Long Action and Short Action based on the cartridge lengths.
Short Action:
- 22-250 Rem
- 223 Rem
- 243 Win
- 6.5 Creedmoor
- 7mm-08 Rem
- 308 Win
Long Action:
- 240 Wby Mag
- 25-06 Rem
- 257 Wby Mag
- 6.5 PRC
- 6.5-300 Wby Mag
- 270 Win
- 270 Wby
- 7mm Rem Mag
- 30-06 Sprg
- 300 Win Mag
- 300 Wby Mag
- 338 Win
- 375 H&H
Prefix : Years of Production
V : 1970-1984
VS : 1984- 2010
VL : 1984-1993
VX : 1984-1994
VB : 2010-Present
The Vanguard bolt diameter is .680.
Yes.
Weatherby has changed the twist rate of the Vanguard rifles in the 223 Remington and 308 Winchester chamberings to give the rifle the ability to accurately shoot longer, heavier bullets which are growing in popularity in these chamberings.
The 223 Remington was changed from a 1-12″ twist rate to a 1-9″ twist rate. The twist rate will be the new 1-9″ rate from serial number VB084281.
The 308 Winchester was changed from a 1-12″ twist rate to a 1-10″ twist rate. The twist rate will be the new 1-10″ rate from serial number VB046406.
The thread pitch for Accubrakes depends on the barrel contour and model of Accubrake®. Below is a list of the contours and thread pitches that corresponds with the era of Accubrake®.
Accubrake® –
- #1 contour - 1/2 - 28
- #2 contour - 9/16 - 24
- #3 contour - 5/8 - 24
- #4 contour - 11/16 - 24
Accubrake® ST –
- #1, #1 MOD, #2, #2 MOD contour - 1/2 - 28
- #3 contour - 5/8 - 24
- #4 contour Steel Barrel - 11/16 - 24
- #4 contour Carbon Barrel - 5/8 - 24
There are Weatherby-authorized Accubrake® and Accubrake® ST installation centers located across the United States. You can have an Accubrake® installed on your rifle at any one of these centers or in the Weatherby Custom Shop in Sheridan, WY. The work done by these centers is the same as would be done by the factory and the warranty of the rifle would still be in place. A list of these authorized installation centers can be found on this website. You can also call Weatherby for a list, at (307)-675-7840.
We will not facilitate the sale of a brake directly to a consumer to be installed by a Non-Weatherby gunsmith. Any brake installed outside of the Weatherby Custom Shop or an Authorized Service Center will void the warranty and accuracy guarantee of the rifle.
Any muzzle brake can change the harmonics of the barrel. However; with the Accubrake® we normally see only a slight change in the point of impact, not in the accuracy of the rifle.
Serial Number Prefix: Years of Production
AC : 1981-1982
AS : 2006-2011
AT : 1971-1982
J : 1967-1971
JC : 1984-1988
JT : 1984-1988
N : 1972-1980
The magazines for the bolt action Mark XXII and the semi-auto Mark XXII are not interchangeable.
Semi-auto Mark XXIIs with either a 5 digit serial number, or a serial number with a J prefix will use the semi auto magazine, part number 4751, with the round-nose front. Serial numbers with prefixes of N, AC, or JC use a different magazine, still part number 4751, but the magazine front was squared. An example of the rounded front can be seen below. These semi-auto magazines of both styles can be best located with either Numrich, Brownells, or TripleK.com.
Bolt Action style Mark XXII magazines can be purchased from Anschutz. The part numbers for the magazines are:
Bolt Action style Mark XXII magazines can be purchased from Anschutz. The part numbers for the magazines are:
- #012961 1517-U4 Magazine 4-shot, cal. .17 HMR
- #001153 1420-U5 Magazine 5-shot, cal. .22 LR
- #001154 1420-U13 Magazine 10-shot, cal. .22 LR
Weatherby no longer manufactures rifle scopes, or other optic products, nor do we promote any particular brand. We do recommend, due to the amount of recoil sometimes experienced with the larger magnum rifles, that you choose a well-made, high quality scope and mounts.
| Mark XXI ® scopes | Manufacturer: Asia optical (Japan) | 1964-1989 |
| Sightmaster® spotting scope | Manufacturer: Asia optical (Japan) | 20X-45X: 1972- 1982 20x-60x: 1983-1989 |
| Imperial® scopes | Manufacturer: Hertel & Reuss, (West Germany) | 1954-1973 |
| Premier® scopes | Manufacturer: Asia Optical (Japan) | 1973-1982 |
| Supreme scopes | Manufacturer: Asia Optical (Japan) | 1983-1994 |
We recommend sending scopes for repair to the business listed below:
Parsons Scope Service
1563 Compton Road
Cincinnati, OH 45231
(513) 867-0820
Lightweight rings: 17-20 in/lb on ring and base screws.
Steel fixed rings: 30 in/lb bottom screw, 20 in/lb top screw.
Steel screw lock detachable and quick release ring: 6-48 bottom screws 30 in/lb, 10-32 screw 35 in/lb, top screws 20 in/lb.
Steel Bases: 20-25 in/lb
Vanguard Lightweight Scope Mounts
Ring Height: Objective Diameter (in Inches) / Recommended Objective sizes
Low: 2.00″ and smaller / 30 – 44mm objectives
Medium: 2.00″ – 2.20″ / 50mm objectives
High: 2.20″ – 2.40″ / 50mm+ objectives
Steel Fixed & Quick Detachable Rings
Ring Height: Objective Diameter (in Inches) / Recommended Objective sizes
Low: 2.036″ and smaller” / 30 – 44mm objectives
Medium: 2.236″ – 2.14″ / 50mm objectives
High: 2.436″ – 2.34″ / 50mm+ objective
Talley Manufacturing Lightweight Scope Mounts, Picatinny Rails and Bases
Mark V 9 Lug
1" Scope Mounts | 30mm Scope Mounts | Picatinny Rails | Bases |
930705 | 730705 | P00252705 | 252705 |
940705 | 740705 | P0M252705 | 252705TS |
950705 | 750705 | P0M705ACI | 252742 |
Mark V 6 Lug
1" Scope Mounts | 30mm Scope Mounts | Picatinny Rail | Bases |
930706 | 730706 | P00252706 | 252706 |
940706 | 740706 | P0M252706 | 252743 |
950706 | 750706 | P0M706ACI |
|
Vanguard
1" Scope Mounts | 30mm Scope Mounts | LA Picatinny Rail | SA Picatinny Rail | Bases |
930734 | 730734 | PL0252150 | PS0252150 | 252734 |
940734 | 740734 | PLM252150 | PSM252150 |
|
950734 | 750734 |
|
|
|
Leupold Picatinny Rails and Bases
Mark V 9 Lug Leupold Picatinny Rail and Bases
Picatinny Rail Product Codes | Base Product Codes |
171354 | 51700 through 51709 |
171355 (20 MOA Rail) | 171709 ( 2 Pc base) |
Mark V 6 Lug Leupold Picatinny Rail and Bases
Picatinny Rail Product Codes | Base Product Codes |
171352 | 52319 |
| 52507 |
Vanguard Leupold Picatinny Rail
Picatinny Rail Product Codes (Short Action Only) |
171514 |
171515 (20 MOA Rail) |
We do have Picatinny mounts for the Mark V® (both two-piece and One-Piece). Near Manufacturing, Talley Manufacturing, Warne, and EGW (Evolution Gun Works) have a Picatinny rail for both the Mark V and Vanguard lines as well.
We recommend using the Peak 44 JRail Picrail
Cartridge – Year Introduced Commercially:
.220 Rocket Magnum – 1945
.224 Weatherby Magnum – 1964
.228 Weatherby Magnum – 1947
.240 Weatherby Magnum – 1968
.257 Weatherby Magnum – 1945
6.5 Weatherby RPM – 2019
6.5-300 Weatherby Magnum – 2016
.270 Weatherby Magnum – 1945
7MM Weatherby Magnum – 1947
.300 Weatherby Magnum – 1945
.338 Weatherby RPM – 2022
.30-378 Weatherby Magnum – 1996
.340 Weatherby Magnum – 1963
.338-378 Weatherby Magnum – 1998
.375 Weatherby Magnum – 1947
.378 Weatherby Magnum – 1956
.416 Weatherby Magnum – 1989
.460 Weatherby Magnum – 1959
You must be 18 years or older to purchase rifle ammunition. Shipping is not available to P.O. Boxes, International Addresses, AK, CA, HI, MA, CT, IL, NY nor DC residents. Residents of DE, KS, OH, and WA may have additional restrictions. All ammunition is shipped domestic ground and an adult signature is required upon arrival. We do not accept returns on ammunition.
If you live in a state that direct orders are not available, please visit our Dealer Locator to find a local dealer who may already have inventory available, or can order that ammunition on your behalf.
B.C. stands for ballistic coefficient.
Ballistic Coefficient (BC) is the ratio of a bullets sectional density to its coefficient of form, used to describe the bullets effectiveness in overcoming air resistance.
Nosler Reloading Guide: fifth edition. USA: 2002
Weatherby does not offer reloading information. Weatherby once made reloading dies, but they have been discontinued. We suggest you obtain reloading information from the following companies:
Hornady
P.O. Box 1848
Grand Island, NE 68802-1848
(800) 338-3220
Nosler, Inc.
P.O. Box 671
Bend, OR 97709
(800) 285-3701
Barnes Bullets Co.
P.O. Box 215
American Fork, UT 84003
(800) 574-9200
email@barnesbullets.com
Accurate Arms Co., Inc.
5891 Highway 230
West McEwen, TN 37101
(615) 729-4207
Sierra Bullets
P.O. Box 818
Sedalia, MO 65302-0818
(660) 827-6300
sierra@sierrabullets.com
Speer, Inc.
P.O. Box 856
Lewiston, ID 83501
(800) 666-5761
Weatherby currently manufactures ammunition for Weatherby Magnum calibers, as well as options for the 6.5 PRC, 7mm PRC, 280 Ack Imp, 28 Nosler, and 300 PRC.
Weatherby recommends you purchase premium standard cartridge ammunition from a high quality ammunition manufacturer for use in your Weatherby rifle.
NOTE: Weatherby did also produce a small run of non-Weatherby caliber ammunition in 1997. Calibers included: .270 Win. .30-06 Sprg., 7mm Rem. Mag., .300 Win. Mag., .338 Win. Mag. and .375 H&H Mag.
Weatherby does not sell an adapter for the 11mm(3/8) Dovetail featured on 18i shotgun models, but they are readily available.
Thanks for purchasing an 18i Shotgun. The 18i series of shotguns features an 11mm(3/8) Dovetail on top of the receiver. If you purchase the correct adapter and red dot mounting system, the pairing should be simple to install and perform flawlessly.
Many manufactures produce adapters for 11mm(3/8) Dovetail to 20mm Picatinny rail.
Choke tubes can be identified by the number and placement of small notches found on their muzzle ends. Be sure to clear and make safe any shotgun before looking at any installed chokes.
Notches / Choke Constriction
O / Extra Full
I / Full
II / Improved Modified
III / Modified
IIII / Improved Cylinder
IIIII / Skeet
IIIIII / Cylinder
I-I / SC I
II-II / SC II
Weatherby recommends slugs only be fired using a non-ported cylinder choke. Smooth bore barrels with choke tubes should have “Cylinder Choke” tubes installed when using Foster or Brenneke style rifled slugs. A “Cylinder Choke” will provide the best accuracy. Any choke with constriction of .020″ or more can result in damage to the barrel. Our “Improved Choke” tubes have a constriction of .013″ and therefore may be used with rifled slugs; however, accuracy may be compromised.
At no time should you shoot without a choke tube installed as this may cause damage to the choke tube threads in the barrel.
When using steel shot, or any shot similar to steel, such as TSS or Bismuth, you should only use stainless steel choke tubes with modified or more open chokes. You should not use steel shot with Extra Full, Full, or Improved Modified Chokes of any kind.
If it is a fixed choke barrel, we do not recommend using steel shot, as it may damage your barrel(s). You may have fixed chokes on the older Centurion I, Centurion II, Orion, Athena, and Model 82 Shotguns.
Semi-Auto Shotgun Model : (Years of Production) / Serial Number Prefixes
Centurion® (Japan): (1972 – 1975) / A -NA Prefix
Centurion® II (Japan): (1976 – 1981) / A – NA Prefix
Model 82 (Japan): (1982 – 1989) / 82- Prefix
SAS (Japan): (1999 – 2002) / SA Prefix
SAS (Italy): (2002 – 2007) / Q – X Prefix
SA-08 12 ga. (Turkey) : (2008 –) / AD Prefix
SA-08 20 ga. (Turkey) : (2008 –) / AE Prefix
Element 12 ga. (Turkey) : (2015-) / RL Prefix
Element 20 ga. (Turkey) : (2015-) / RM Prefix
18i 12 ga. (Italy) : (2019-) / NM – NN Prefix
18i 20 ga. (Italy) : (2019-) / NP Prefix
SORIX 12 ga. (Italy) : (2024-) / NA Prefix
SORIX 20 ga. (Italy) : (2024-) / NC Prefix
We do! Check out our Quick Tips section for several videos covering most questions you may have about your shotgun.
Over/Under Shotguns: (Years of Production) / Serial Number Prefixes
Regency® (Italy) : (1967 – 1982) / R
Olympian® (Japan) : (1977 – 1981) / K-R-W
Athena® (Japan, Version I) : (1982 – 2007) / D-F-FF
Athena® III, IV, V (Japan): (1990 – 2007) / DA-DF
Orion® (Japan, Version I) : (1982 – 2007) / E-G-EE-GG
Orion® I II III (Japan) : (1990 – 2007) / EN-ER-GN-GR
Athena® D’Italia III, IV, V (Italy): (2007 – 2011) / L
Orion ® D’Italia I, II, III, SC. (Italy) : (2007 – 2011 ) / B – L
Orion® I (Turkey) : (2016-) / AU
Side-by-Sides: (Years of Production) / Serial Number Prefixes
Athena® SxS (Italy) : (2005 -2010) / FS
Orion® SxS (Italy) : (2005 -2011 ) / FS
Orion® SxS (Turkey) : (2023- ) / 79-H23YY
Pump Shotgun Model : (Years of Production) / Serial Number Prefix
Patrician® I Pump (Japan) : (1972 – 1974) / No Prefix
Patrician® I Pump (Japan) : (1973 – 1975) / S0
Patrician® I Pump (Japan) : (1975 – 1976) / N – NS
Patrician® II Pump (Japan) : (1976 -1981) / S – W
Model 92 Pump (Japan) : (1982 – 1989) / NS
PA-08 Pump 12 ga. (Turkey) : (2008 –2017) / TP
PA-08 Pump 20 ga. (Turkey) : (2008 –2017) / TA
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