Chambers List

Match Grade Machine Custom Gun Barrels
We have developed quite a stash of chamber reamers over the years while building custom barrels. *If you do not see the chamber you are interested in this chambers list, feel free to give us a call and we can see what we can do for you.*
We take our sweet time in the chamber reaming process. We make sure our chambers are properly aligned and correctly headspaced. Also, none of our pistol chambers use the SAAMI forcing cone throats, rather we separately add a tight cylindrical "rifle" type throats with 1*-30 lead angles. This ensures proper bullet alignment to the bore and grooves without any radical jump. Starline Brass offers an excellent array of brass in both modern and odd-ball cartridges, check them out for your brass needs!
For those who hand load and take full advantage of the single shot capabilities of not having to fit their rounds in magazines or blind mag boxes, we offer custom chamber services at no extra charge. In most cases, we can ream chambers with specific neck diameters and throat lengths to accommodate custom hand-loaded ammunition. Please feel free to give us a call and we can get your barrel built exactly how it should!

17 Cal (.172) – Chambers List

  • 17 Mach II (22 LR Necked Down)
  • 17 Aguila (22 LR Necked Down)
  • 17 K Hornet
  • 17 Ackley Bee
  • 17 Mach IV
  • 17 - 222 Remington
  • 17 Tactical
  • 17 VHA
  • 17 HMR (22 Mag Necked Down)
  • 17 Squirrel
  • 17 Ackley Hornet
  • 17 Hornady Hornet
  • 17 Fireball
  • 17 Remington
  • 17 x 50
  • 17 - 223 Remington
Twist Rates Available
1 – 8.5

20 Cal (.204) – Chambers List

  • 20 Squirrel
  • 20 Ackley Hornet
  • 20 Vartarg
  • 20 Tactical
  • 20 TNT
  • 20 Practical

  • 20 BR
    Encore Only

  • 20 Ackley Bee
  • 20 x 5.7 x 28
  • 20 Vartarg Turbo
  • 204 Ruger
  • 20 - 221

  • 20 PPC
    Encore Only

Twist Rates Available
1 – 11
1 – 8.5

22 Cal (.224) – Chambers List

  • 22 LR Match (.222 Bore)
  • 22 WRM (.224 Bore)
  • 22 K Hornet
  • 5.7 x 28
  • 22 Squirrel
  • 222 Remington
  • 218 Bee

  • 223 Remington

  • 22 Remington Jet
  • 22 TCM
  • 223 Wylde

  • 22 PPC
    Encore and G2 Only

  • 22-250 Remington
    Encore Only

  • 22-243 Middlestead (243 Win)
    Encore Only

  • 220 Swift Ackley Improved
    Encore Only

  • 224 Texas Trophy Hunter
    Encore Only

  • 22 Creedmoor
    Encore Only

  • 22 GT
    Encore Only

  • 22 Dasher 169 Freebore
    Encore Only – For 95 Grain SMK

  • 22 Short Match (.222 Bore)
  • 22 CCM (.224 Bore)
  • 22 Hornet
  • 221 Remington Fireball
  • 22 Vartarg
  • 222 Remington Magnum
  • 218 Mashburn Bee
  • 219 Donaldson Wasp
  • 22 Mag Match
  • 219 Zipper
  • 223 Remington AI 40°

  • 224 Valkyrie
    Encore and G2 Only

  • 225 Winchester
    Encore Only

  • 22-250 Ackley Improved
    Encore Only

  • 220 Swift
    Encore Only

  • 22-6 Remington Ackley Improved
    Encore Only

  • 22 BR
    Encore Only

  • 224 Weatherby
    Encore Only

  • 22 Dasher 115 Freebore
    Encore Only

Twist Rates Available
1 – 6 (95+ grain)
1 – 6.5
1 – 7 (80 – 90 grain + Subsonic)
1 – 7.5
1 – 8 (70 – 80 grain)
1 – 9 (60 – 70 grain)
1 – 12 (40 – 55 grain)
1 – 14 (30 – 40 grain)
1 – 16 (Rimfire 22LR)

6mm (.243) – Chambers List

  • 6mm x 47 (6mmx222 Rem Mag)
  • 6mm Vartarg Turbo
  • 6mm TCU

  • 6mm AR
    Encore and G2 Only

  • 6mm AR Turbo 40*
    Encore and G2 Only

  • 6mm x 30-30 Ackley Improved
    Encore and G2 Only

  • 6mm ARC
    Encore and G2 Only

  • 6mmx47 Lapua
    Encore Only

  • 6mm Dasher Norma
    Encore Only

  • 243 Winchester
    Encore Only

  • 6mm Remington
    Encore Only

  • 6mm Ackley Improved
    Encore Only

  • 6mm x 284 Winchester
    Encore Only

  • 6mm Vartarg
  • 6mm x 45mm (6mmx223 Remington)

  • 6mm PPC
    Encore and G2 Only

  • 6mm-6.5mm Grendel
    Encore and G2 Only

  • 6mm x 30-30 Winchester
    Encore and G2 Only

  • 6mm Hagar
    Encore and G2 Only

  • 6mm BR Norma
    Encore Only

  • 6mm Dasher
    Encore Only – 104 Freebore

  • 6mm-250 Ackley Improved
    Encore Only

  • 6mm Creedmoor
    Encore Only

  • 6mm-06
    Encore Only

  • 6mm XC
    Encore Only

  • 240 Weatherby
    Encore Only

Twist Rates Available
1 – 7 (107+ grain)
1 – 7.5 (100+ grain)
1 – 8 (90+ grain)
1 – 10 (70 – 90 grain)

25 Cal (.257) – Chambers List

  • 25-20 Winchester
  • 256 Super Mag
  • 25 x 45mm Sharps

  • 25 x 30-30 Winchester
    Encore and G2 Only

  • 25-35 Ackley Improved
    Encore and G2 Only

  • 257 Roberts Ackley Improved (40 Degree)
    Encore Only

  • 25-06 Ackley Improved
    Encore and G2 Only

  • 250 Savage Improved
    Encore Only

  • 25 Creedmoor BJ (.150 FB)
    Encore Only

  • 256 Winchester Magnum
  • 25-35 Winchester
  • 257 TCU

  • 25 x 30-30 Ackley Improved
    Encore and G2 Only

  • 257 Roberts
    Encore Only

  • 25-06 Remington
    Encore Only

  • 250 Savage
    Encore Only

  • 25 Creedmoor (.115 FB)
    Encore Only

  • 25x47mm Lapua BJ
    Encore Only

Twist Rates Available
1 – 7
1 – 7.5
1 – 10

6.5mm (.264) – Chambers List

  • 6.5mm TCU

  • 6.5mm x 30-30 Winchester
    Encore and G2 Only

  • 6.5mm PPC
    Encore Only

  • 6.5mm-250 Savage
    Encore Only

  • 6.5mm - 284 Norma Match
    Encore Only

  • 6.5-06 A-Square
    Encore Only

  • 260 Remington
    Encore Only

  • 6.5mm Remington Magnum
    Encore Only

  • 264 Winchester Magnum
    Encore Only

  • 6.5mm Grendel
    Encore and G2 Only

  • 6.5mm x 30-30 Ackley Improved
    Encore Only

  • 6.5mm Creedmoor
    Encore Only - See link for velocity testing!

  • 6.5mm BR Remington
    Encore Only

  • 6.5mm-284 Norma (.297″ Neck)
    Encore Only

  • 6.5 PRC
    Encore Only

  • 6.5mm-06 Ackley Improved
    Encore Only

  • 260 Ackley Improved
    Encore Only

  • 6.5 x 55mm Swedish
    Encore Only

  • 6.5 x 55mm Improved
    Encore Only

Twist Rates Available
1 – 7 (147+ grain)
1 – 7.5 (145+ Grain)
1 – 8 (120+ grain)

270 Cal (.277) – Chambers List

  • 270 Ren

  • 6.8 Remington SPC II
    Encore and G2 Only

  • 277 Wolverine
    1-7″ Blanks Available

  • 270 Winchester
    Encore Only

Twist Rates Available
1 – 7 (Subsonic)
1-8
1-9
1 – 10

7mm (.284) – Chambers List

  • 6.5mm TCU

  • 6.5mm x 30-30 Winchester
    Encore and G2 Only

  • 6.5mm PPC
    Encore Only

  • 6.5mm-250 Savage
    Encore Only

  • 6.5mm - 284 Norma Match
    Encore Only

  • 6.5-06 A-Square
    Encore Only

  • 260 Remington
    Encore Only

  • 6.5mm Remington Magnum
    Encore Only

  • 264 Winchester Magnum
    Encore Only

  • 6.5mm Grendel
    Encore and G2 Only

  • 6.5mm x 30-30 Ackley Improved
    Encore Only

  • 6.5mm Creedmoor
    Encore Only - See link for velocity testing!

  • 6.5mm BR Remington
    Encore Only

  • 6.5mm-284 Norma (.297″ Neck)
    Encore Only

  • 6.5 PRC
    Encore Only

  • 6.5mm-06 Ackley Improved
    Encore Only

  • 260 Ackley Improved
    Encore Only

  • 6.5 x 55mm Swedish
    Encore Only

  • 6.5 x 55mm Improved
    Encore Only

Twist Rates Available
1 – 7 (147+ grain)
1 – 7.5 (145+ Grain)
1 – 8 (120+ grain)

30 Cal (.308) – Chambers List

  • 32-20 Winchester (.308 Bore)
  • 30 Reece
  • 300-221 ("Whisper")
  • 30 Herrett

  • 30-30 Ackley Improved

  • 30 Badger

  • 7.62 x 39mm (.308 Bore)
    Encore Only

  • 30-40 Krag Ackley Improved
    Encore Only

  • 30 BR
    Encore Only

  • 308 Winchester
    Encore Only

  • 300 H&H Magnum
    Encore Only

  • 30-06 Ackley Improved
    Encore Only

  • 7.62 x 54mm R (.308 Bore)
    Encore Only

  • 30 Carbine
  • 300 AAC Blackout

  • 7.62 x 25mm Tokarev (.308 Bore)

  • 30-30 Winchester

  • 30-40 Krag

  • 300 HAM'R

  • 300 Savage
    Encore Only

  • 30 T/C
    Encore Only

  • 308 Winchester Ackley Improved
    Encore Only

  • 30-06 Springfield
    Encore Only

  • 300 Winchester Magnum
    Encore Only

Twist Rates Available

1 – 7 (Subsonic for 240+ grain)

1 – 8 (Subsonic or 220+ grain)

1 – 10 (175 – 210 grain)

1 – 12 (115 – 168 grain)

.311 – Chambers List

  • 32 H&R Magnum (.311 Bore)
  • 327 Federal (.311 Bore)
  • 7.62x25mm Tokarev (.311 Bore)

  • 7.62x54mm R (.311 Bore)
    Encore Only – Never use steel cased ammo

  • 32 S&W Long

  • 32-20 Winchester (.311 Bore)

  • 7.62x39mm (.311 Bore)
    Encore and G2 Only - Never use steel cased ammo

  • 303 British
    Encore Only

Twist Rates Available

1 – 10

1 - 5

8mm (.323) – Chambers List

  • 7.92 x 33mm Kurz
    Encore and G2 Only

  • 8mm-06
    Encore Only

  • 8mm Mauser
    Encore Only

  • 8mm Remington Magnum
    Encore Only

Twist Rates Available

1 – 12

338 Cal – Chambers List

  • 338x30-30

  • 338 ARC
    Encore or G2 Only

  • 338 Federal
    Encore Only

  • 338 Winchester Magnum
    Encore Only

  • 338-06 Ackley Improved
    Encore Only

  • 338-221 Remington

  • 338 Marlin Express
    Encore Only

  • 338-08 Ackley Improved
    Encore Only

  • 338-06
    Encore Only

  • 8.6 Blackout
    Encore Only

Twist Rates Available

1 – 3

1 – 6

1 – 10

9mm (.355) – Chambers List

  • 9mm Luger

  • 357 Sig

  • 350 Legend

  • 380 ACP

Twist Rates Available

1 – 10

1 – 16

357 Cal – Chambers List

  • 38 Special
    See link for load data and velocity testing!

  • 360 Dan Wesson

  • 357 Herrett

  • 35 Remington

  • 360 Buckhammer

  • 358 Hoosier
    Encore Only

  • 35 Whelen
    Encore Only

  • 264 Winchester Magnum
    Encore Only

  • 357 Magnum
    See link for load data and velocity testing!

  • 357 Maximum
    See link for load data and velocity testing!

  • 35 x 30-30 Winchester

  • 358 MGM IDC (Based Off 35 Rem 1.800″)

  • 358
    Encore Only

  • 35 Whelen Ackley Improved
    Encore Only

  • 35 Winchester
    Encore Only

Twist Rates Available

1 – 12 (360 Buckhammer)

1 – 14

1 – 16

366 Cal – Chambers List

  • 9.3 x 74mm R
    Encore Only

  • 9.3 x 62mm
    Encore Only

Twist Rates Available

1 – 14

375 Cal – Chambers List

  • 38-55 WCF

  • 375-444 Marlin
    Encore and G2 Only

  • 375 Raptor
    Encore Only

  • 264 Winchester Magnum
    Encore Only

  • 375 Winchester

  • 375 H&H Magnum
    Encore Only

Twist Rates Available

1 – 8

1 – 8 (120+ grain)

10mm/40 Cal (.400) – Chambers List

  • 40 S&W

  • 10mm Magnum

  • 400 Legend

  • 10mm Auto

  • 38-40 Winchester

Twist Rates Available

1 – 16

410 Cal (.411) – Chambers List

  • 41 Magnum

  • 405 Winchester
    Encore and G2 Only

  • 414 Super Magnum

Twist Rates Available

1 – 14

429 Cal – Chambers List

  • 44-40 Winchester
  • 44 Automag (44 AMP)

  • 444 Marlin
    Encore and G2 Only – See link for velocity testing!

  • 44 Remington Magnum

  • 445 Super Magnum

  • 44 Special - 1.160" Trim Length

Twist Rates Available

1 – 20

451 Cal – Chambers List

  • 45-410 (Rifled Barrel)

  • 45 Win Mag

  • 450 Bushmaster
    Encore Only – See link for velocity testing

  • 460 S&W Magnum
    Encore Only – See link for velocity testing!

  • 45 ACP

  • 45 Long Colt

  • 454 Casull
    Encore Only

  • 45 Raptor
    Encore Only

Twist Rates Available

1 – 16

1 – 20

458 Cal – Chambers List

  • 45-70 1.800"

  • 450 Marlin
    Encore Only

  • 458 Winchester Magnum
    Encore Only

  • 45-120 Sharps
    Encore Only

  • 45-70 US Government
    Click this link for velocity testing!

  • 450 Alaskan
    Encore Only

  • 458 Lott
    Encore Only

  • 45 Basic
    Encore Only

Twist Rates Available
1 – 10
1 – 20

Custom Encore and Contender and Contender G2 Barrels

Don't see the chamber you need? Give us a call and we'll work with you to build exactly what you want!
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