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Caliber and Twist Rates

 

Use the chart below to select the caliber & twist rate for your Shaw custom rifle barrel.

Twist rates must correspond to the calibers listed.

Please refer to the icons in the caliber list to determine which twist rate can be used in your custom barrel. The number in the box corresponds to the number of inches per complete right-hand twist. For example: 14 would mean that your barrel caliber requires a twist rate of 1 in 14 inches.

Shaw Caliber and Twist Rates

-ALL Available Cartridges for Bolt-Action Rifle Barrels.
-Please note that not all cartridges are available or advisable for use in all actions.
-All reamer dimensions are to SAAMI specifications unless a wildcat or otherwise noted.
-All Ackley cartridge shoulder angles are 40 degree. 
-280 Ackley Improved is SAAMI spec.
-(No Fit) next to a cartridge name means that fitting service is unavailable for that specific cartridge.
-We do NOT cut custom throat dimensions.

9

17 REM FIREBALL
17 REMINGTON

12

20 VARTARG (NO FIT)
204 RUGER

6.5 | 7 | 8 | 9 | 12 | 14

221 REM FIREBALL
222 REMINGTON
223 REMINGTON
223 REMINGTON ACK
223 WYLDE
5.56 NATO
222 REM MAG
225 WINCHESTER
224 WBY MAG
22 NOSLER
224 VALKYRIE
22-250 REMINGTON
22-250 REM ACK
220 SWIFT
224 TTH
22 CREEDMOOR

7 | 8 | 9 | 10

6 x 45mm
6mmx47
6mm ARC
6mm BR NORMA
243 WINCHESTER
243 WINCHESTER ACK
6mm REMINGTON
6mm REMINGTON ACK
6mm CREEDMOOR
6x47 LAPUA
6mm-284
6mm-06
240 WBY MAG

10

250 SAVAGE
250 SAVAGE ACK
257 ROBERTS
257 ROBERTS ACK
25-284 (NO FIT)
25-06 REMINGTON
25-06 REMINGTON ACK
257 WBY MAG

8 | 9

6.5 GRENDEL
6.5x55 
6.5 CREEDMOOR
260 REMINGTON
260 REMINGTON ACK
6.5x47 LAPUA
6.5-284 NORMA
6.5-06
6.5-06 ACK
6.5 Rem Mag (NO FIT)
6.5 PRC
264 WIN MAG
26 NOSLER
6.5-300 WBY MAG

8.5 | 10

6.8mm REM SPC II
270 WINCHESTER
270 WBY MAG
27 NOSLER

8 | 9.5

7mm-08 REMINGTON
7mm-08 REM ACK
7mm MAUSER (7x57)
7mm MAUSER (7x57) ACK
284 WINCHESTER
280 REMINGTON
280 ACKLEY IMPROVED
7mm REM MAG
7mm WBY MAG
28 NOSLER
7mm PRC (NEW!)
7mm REM ULTRA MAG
7mm STW

8 | 10 | 12

300 AAC BLACKOUT
300 HAM'R (1-12")
300 SAVAGE
308 WINCHESTER
30-06 SPRINGFIELD
30-06 SPRINGFIELD ACK
30-338 (NO FIT)
308 NORMA MAG
300 WIN MAG
300 H&H MAG
30 NOSLER
300 REM ULTRA MAG
300 WBY MAG
300 PRC (NO FIT)

10

8mm MAUSER (8x57)
8mm-06
8mm REM MAG

3

8.6 BLACKOUT (NEW!)

10

338 FEDERAL
338-06
338-06 ACK
338 WIN MAG
33 NOSLER
338 REM ULTRA MAG
340 WBY MAG

16

350 LEGEND

14

35 REMINGTON
358 WINCHESTER
35 WHELEN
35 WHELEN ACK
350 REM MAG (NO FIT)
358 NORMA MAG

12

9.3 x 62
370 SAKO MAG

12

375-338 MAG (NO FIT)
375-8mm MAG (NO FIT)
375 H&H MAG
375 RUGER
375 REM ULTRA MAG

15

416 REM MAG
416 TAYLOR (NO FIT) 
416 RUGER

24

450 BUSHMASTER
45 RAPTOR

14 | 22

45/70 GOVT
450 MARLIN
458 WIN MAG
458 LOTT