Bore & Groove

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Bore & Groove 2017-03-15T20:24:33+00:00

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.

rifling_diagram1
Caliber_spectrum_1

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)
    1-16″ (4, 6, & Micro Groove)
    1-20″ (6 Groove)
  • Available Cartridges
    22 LR Sporting, 22 LR Bentz, 22 RF Bentz, 22 RF Short, 22 Hornet 

22 Rim Fire Magnum

  • Bore .218″ | Groove .222″
  • Twists Available
    1-14″ (6 Groove)
    1-16″ (4, 6, &  Micro Groove)
    1-20″ (6 Groove)
  • Available Cartridges
     22 Winchester Magnum 

 

 

 

Caliber_spectrum_2

22 Centerfire

  • Bore .219″ | Groove .224″
  • Twists Available
    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 P, 22 PPC, 221 Remington Fireball, 223 Wylde, 5.56 NATO, 225 Winchester, 22 BR, 22-243 Middlestead 

243/6mm

  • Bore .237″ | Groove .243″
  • Twists Available
    1-7″ (6 Groove)
    1-8″ (4 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

25 Caliber

  • Bore .250″ | Groove .257″
  • Twists Available
    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

6.5 Caliber

  • Bore .256″ | Groove .264″
  • Twists Available
    1-7″ (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 

 

 

 

Caliber_spectrum_3

 

270 Caliber

  • Bore .270″ | Groove .277″
  • Twists Available
    1-7″ (5 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 

7mm

  • Bore .277″ | Groove .284″
  • Twists Available
    1-8″ (4 Groove)
    1-8.5″ (6 Groove)
    1-9″ (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

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
    30 Remington AR, 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 Match, 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

7.62/302 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.

 

 

 

Caliber_spectrum_4

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, 7.62 x 51 NATO, 303 British 

32-40

  • Bore .312″ | Groove .320″
  • Twists Available
    1-10″ (6 Groove)
    1-16″ (6 Groove)
  • Available Cartridges
    32 Winchester Special

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)
    1-9″ (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

 

 

 

Caliber_spectrum_4

9mm

  • Bore .347″ | Groove .355″
  • Twists Available
    1-10″ (4 & 6 Groove)
    1-14″ (4 & 6 Groove)
  • Available Cartridges
    9mm Luger, 380 ACP

357 Caliber

  • Bore .350″ | Groove .357″
  • Twists Available
    1-10″ (6 Groove)
    1-14″ (6 Groove)
    1-20″ (3 Groove)
  • Available Cartridges
    None At This Time

358 Caliber

  • Bore .350″ | Groove .358″
  • Twists Available
    1-5″ (Micro Groove)
    1-6″ (Micro Groove)
    1-7″ (Micro Groove)
    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

9.3 mm

  • Bore .358″ | Groove .366″
  • Twists Available
    1-12″ (6 Groove)
  • Available Cartridges
    9.3 x 62

 

 

 

375 Caliber

  • Bore .368″ | Groove .375″
  • Twists Available
    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

395 Caliber

  • Bore .388″ | Groove .395″
  • Twists Available
    1-12″ (6 Groove)
  • Available Cartridges
    None At This Time

40 Cal Pistol

  • Bore .392″ | Groove .400″
  • Twists Available
    1-14″ (6 Groove)
    1-16″ (6 Groove)
    1-18″ (6 Groove)
    1-20″ (6 Groove)
    1-36″ (6 Groove)
  • Available Cartridges
    None At This Time

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

405 Caliber

  • Bore .402″ | Groove .412″
  • Twists Available
    1-14″ (6 Groove)
    1-18″ (6 Groove)
  • Available Cartridges
    405 Winchester

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

425 Caliber

  • Bore .416″ | Groove .425″
  • Twists Available
    1-10″ (6 Groove)
    1-12″ (6 Groove)
    1-14″ (6 Groove)
  • Available Cartridges
    None At This Time

 

 

 

 

 

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

11.22 mm

  • Bore .432″ | Groove .440″
  • Twists Available
    1-16″ (6 Groove)
  • Available Cartridges
    None At This Time

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

458 Caliber

  • Bore .450″ | Groove .458″
  • Twists Available
    1-8″ (8 Groove)
    1-10″ (6 & 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, 45 Raptor

 

 

 

 

 

475 Caliber

  • Bore .468″ | Groove .475″
  • Twists Available
    1-10″ (6 Groove)
    1-16″ (8 Groove)
    1-20″ (6 Groove)
    1-22″ (6 Groove)
  • Available Cartridges
    None At This Time

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

505 Caliber

  • Bore .497″ | Groove .505″
  • Twists Available
    1-10″ (6 & 8 Groove)
  • Available Cartridges
    None At This Time

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, 50 BMG

 

577 Caliber

  • Bore .577″ | Groove .585″
  • Twists Available
    1-24″ (8 Groove)