We offer our barrels in a variety of calibers/twist combinations from 20 caliber up to 50 caliber. We also offer a few different pistol calibers such as 45 Pistol.
Bore & Groove
Below you will see the calibers and twists that we currently offer. Next to each rifling twist, the number of grooves is shown. There are a lot of debates out there about how many lands/grooves make the most accurate barrel. We can say that without a doubt that we have yet to manufacture a barrel that isn’t inherently accurate.
20 Caliber
- Bore .199″ | Groove .204″
- Twists Available
1-8″ (4 Groove)
1-10″ (6 Groove)
1-11″ (4 Groove)
1-12″ (4 & 6 Groove) - Available Cartridges
204 Ruger, 20 Practical, 20 Vartarg, 20 Tactical
5.45 Caliber
- Bore .215″ | Groove .220″
- Twists Available
1-8″ (4 Groove) - Available Cartridges
5.45 x 39
22 Rim Fire
- Bore .216″ | Groove .222″
- Twists Available
1-9″ (4 Groove)
1-14″ (4 Groove)
1-16″ (3, 4, & 6 Groove)
1-20″ (6 Groove) - Available Cartridges
22 LR Sporting, 22 LR Bentz, 22 RF Short
22 Rim Fire Magnum
- Bore .218″ | Groove .222″
- Twists Available
1-20″ (6 Groove) - Available Cartridges
22 Winchester Magnum
22 Centerfire
- Bore .219″ | Groove .224″
- Twists Available
1-6” (4 groove)
1-7″ (4 & 5 Groove)
1-7.7″ (4 & 5 Groove)
1-8″ (4, 5, & 6 Groove)
1-9″ (4 Groove)
1-10″ (4 & 6 Groove)
1-12″ (4 & 6 Groove)
1-14″ (4 & 6 Groove)
1-16″ (6 Groove) - Available Cartridges
218 Bee, 22 Hornet, 220 Swift, 222 Remington, 22-250 Remington, 22-250 Remington Ackley, 22-250 Remington Match, 223 Remington, 223 Remington Ackley Improved, 223 Remington (.244 Neck), 22 PPC, 221 Remington Fireball, 223 Wylde, 5.56 NATO, 225 Winchester, 22 BR, 22-243 Middlestead, 22 Nosler, 224 Valkyrie, 22 Creedmoor, 22 TCM
243/6mm
- Bore .237″ | Groove .243″
- Twists Available
1-7″ (5 & 6 Groove)
1-7.5″ (6 Groove)
1-8″ (4 & 5 Groove)
1-9″ (6 Groove)
1-10″ (6 Groove)
1-12″ (4 & 6 Groove)
1-14″ (6 Groove) - Available Cartridges
240 Gibbs, 243 Winchester, 243 Winchester Ackley, 244 Ackley, 240 Weatherby Magnum, 6 x 47 Lapua, 6mm BR Norma, 6mm BRX, 6mm Dasher, 6mm Remington, 6mm x 45, 6mm XC, 6mm Benchrest, 6mm-222 Remington, 6mm PPC, 6mm Grendel, 6mm-284 Winchester, 6mm-06 Springfield, 6mm-06 Ackley, 6mm Creedmoor, 6mm ARC
25 Caliber
- Bore .250″ | Groove .257″
- Twists Available
1-7″ (6 Groove)
1-9″ (6 Groove)
1-10″ (6 Groove)
1-12″ (6 Groove)
1-14″ (6 Groove) - Available Cartridges
25 ACP, 25-06, 25-06 Ackley, 257 Roberts, 257 Roberts Ackley, 257 Weatherby, 250 Savage, 257 STW, 25 Creedmoor
6.5 Caliber
- Bore .256″ | Groove .264″
- Twists Available
1-7″ (6 Groove)
1-7.5″ (6 Groove)
1-8″ (5 & 6 Groove)
1-8.5″ (6 Groove)
1-9″ (5 Groove)
1-10″ (6 Groove) - Available Cartridges
6.5 Creedmoor, 6.5 STW, 6.5 Super LR/S, 6.5 TCU, 6.5 WSM, 6.5 RSAUM, 6.5 x 284 Winchester, 6.5 x 284 Lapua, 6.5 x 284 Norma, 6.5 x 300 Winchester, 6.5 x 47 Lapua, 6.5 x 55, 6.5-06, 6.5-06 Ackley Improved, 260 Remington, 6.5 Remington Magnum, 6.5 Grendel, 264 LBC, 264 Winchester Magnum, 260 Remington Ackley Improved, 26 Nosler, 6.5 PRC
270 Caliber
- Bore .270″ | Groove .277″
- Twists Available
1-7″ (5 Groove)
1-7.5″ (6 Groove)
1-8″ (5 Groove)
1-9″ (6 Groove)
1-10″ (5 & 6 Groove)
1-11″ (5 & 6 Groove) - Available Cartridges
270 Winchester, 6.8 SPC, 6.8 Remington SPC II, 270 WSM, 270 Weatherby Magnum, 27 Nosler, 6.8 Western, 277 Fury
7mm
- Bore .277″ | Groove .284″
- Twists Available
1-8″ (5 Groove)
1-8.5″ (6 Groove)
1-9″ (5 & 6 Groove)
1-10″ (6 Groove) - Available Cartridges
7 x 57, 7 x 64, 7mm Remington Magnum, 7mm Remington Ultra Magnum, 7mm RSAUM, 7mm STW, 7mm TCU, 7mm WSM, 7mm-08, 280 Remington, 280 Remington Ackley, 284 Winchester, 7 x 64mm, 7-30 Waters, 7mm Dakota, 7mm Benchrest, 7mm LRM, 28 Nosler, 284 Winchester Gap, 7mm PRC
30 Caliber
- Bore .300″ | Groove .308″
- Twists Available
1-7″ (4, 5, & 6 Groove)
1-8″ (5 & 6 Groove)
1-9″ (6 Groove)
1-10″ (5 & 6 Groove)
1-11″ (6 Groove)
1-12″ (6 Groove) - Available Cartridges
300 AAC Blackout, 300 H&H, 300 Remington Ultra Magnum, 300 Remington Ultra Match, 300 Remington Ultra Magnum Match, 300 Winchester Magnum, 300 WSM, 300 Norma, 30-06 Springfield, 30-06 Springfield Match, 30-40 Krag, 308 Winchester, 308 Winchester Match, 300 Weatherby Magnum, 30-378 Weatherby, 300 Winchester Magnum Match, 30-221 Fireball, 30-30 Winchester, 7.82 Warbird, 30 Nosler, 7.62 x 51 NATO, 300 PRC, 300 Ham’r
7.62/302 Caliber
- Bore .302″ | Groove .310″
- Twists Available
1-8″ (6 Groove)
1-10″ (6 Groove)
1-12″ (6 Groove) - Available Cartridges
**Note we can chamber 7.62 x 39 or 7.62 x 54R in this bore/groove combinaton, please be sure of the bullet diameter you will be using before choosing this option.
303 Caliber
- Bore .303″ | Groove .311″
- Twists Available
1-10″ (6 Groove)
1-16″ (6 Groove)
1-18″ (6 Groove) - Available Cartridges
7.62 x 39, 7.62 x 39 Match, 7.62 x 54R, 303 British
8mm
- Bore .315″ | Groove .323″
- Twists Available
1-10″ (6 Groove) - Available Cartridges
325 WSM, 8 x 57 Mauser
338 Caliber
- Bore .330″ | Groove .338″
- Twists Available
1-6.5″ (6 Groove)
1-8″ (6 Groove)
1-9″ (6 Groove)
1-10″ (6 Groove) - Available Cartridges
338 Edge Match, 338 Edge, 338 Federal, 338 Lapua, 338 Remington Ultra Magnum, 338 Winchester Magnum, 338-06, 338-06 Ackley, 338-378 Weatherby, 338 RCM, 340 Weatherby, 33 Nosler
9mm
- Bore .347″ | Groove .355″
- Twists Available
1-10″ (4 & 6 Groove)
1-14″ (4 & 6 Groove) - Available Cartridges
9mm Luger, 380 ACP, 350 Legend
357 Caliber
- Bore .350″ | Groove .357″
- Twists Available
1-10″ (6 Groove)
1-14″ (6 Groove)
1-16″ (6 Groove)
1-20″ (3 Groove) - Available Cartridges
None available at this time.
358 Caliber
- Bore .350″ | Groove .358″
- Twists Available
1-10″ (6 Groove)
1-12″ (6 Groove)
1-14″ (5 & 6 Groove)
1-16″ (6 Groove) - Available Cartridges
35 Whelen, 35 Remington, 358 Norma Magnum, 358 Winchester
375 Caliber
- Bore .368″ | Groove .375″
- Twists Available
1-9″ (6 Groove)
1-10″ (6 Groove)
1-12″ (6 Groove)
1-16″ (6 Groove)
1-18″ (6 Groove)
1-20″ (6 Groove) - Available Cartridges
375 H&H, 375 H&H Magnum, 375 Remington Ultra Magnum, 375 Ruger, 38-55 Winchester, 38-72 Winchester
408 Caliber
- Bore .400″ | Groove .408″
- Twists Available
1-13″ (6 Groove)
1-16″ (6 Groove)
1-18″ (6 & 8 Groove)
1-20″ (6 Groove) - Available Cartridges
None At This Time
41 Caliber
- Bore .402″ | Groove .409″
- Twists Available
1-14″ ( 6 Groove)
1-18″ ( 6 Groove) - Available Cartridges
None at this time
416 Caliber
- Bore .408″ | Groove .416″
- Twists Available
1-10″ (6 Groove)
1-14″ (6 Groove) - Available Cartridges
416 Barrett, 416 Remington Magnum, 416 Taylor
44 Caliber
- Bore .422″ | Groove .429″
- Twists Available
1-10″ ( 6 Groove)
1-18″ ( 6 & 8 Groove)
1-20″ (6 Groove)
1-24″ ( 6 Groove)
1-36″ (6 Groove) - Available Cartridges
44 Magnum, 444 Marlin
45 Pistol
- Bore .442″ | Groove .451″
- Twists Available
1-10″ (6 Groove)
1-16″ (6 Groove)
1-18″ (6 Groove)
1-24″ (6 Groove)
1-36″ (8 Groove) - Available Cartridges
45 ACP, 45 Winchester Magnum, 450 Bushmaster, 45 Raptor
458 Caliber
- Bore .450″ | Groove .458″
- Twists Available
1-8″ (8 Groove)
1-10″ (8 Groove)
1-14″ (6 & 8 Groove)
1-16″ (8 Groove)
1-18″ (8 Groove)
1-22″ (8 Groove)
1-24″ (6 Groove) - Available Cartridges
458 Winchester Magnum, 458 Lott, 458 SOCOM, 45-70, 450 Alaskan (Johnson Version)
50 Cal Pistol
- Bore .492″ | Groove .500″
- Twists Available
1-12″ (6 Groove)
1-14″ (6 Groove)
1-20″ (6 Groove) - Available Cartridges
500 S&W, 500 S&W Magnum
50 Caliber
- Bore .500″ | Groove .510″
- Twists Available
1-10″ (8 Groove)
1-12″ (6 & 8 Groove)
1-15″ (3 & 8 Groove)
1-20″ (6 & 8 Groove)
1-24″ (6 & 8 Groove)
1-28″ (8 Groove) - Available Cartridges
500 A-Square