Rifle Barrel Twist Rates Available at EABCO

For TC Encore Factory and Custom Barrels, Savage Bolt Guns, Model 97D Rifles and BF Pistols

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2001-2012 E. Arthur Brown Co., sales@eabco.com, 4088 County Road 40 NW, Garfield, MN 56332
ph. 320-834-3000, FAX 320-834-3002 , Orders Only Toll Free 1-800-950-9088 * Oversized Pivot Pins Void All Warranties

Available EABCO Twist Rates
  The optimum rate of twist for a barrel depends on the particular cartridge, caliber, and bullet weight you are wanting to use. Here are the twists we offer:
.17 Cal - 1:9
.22 RF Cal - 1:16
.22 CF Cal - 1:7, 1:9, 1:12, 1:14
6mm/.243 - 1:8, 1:10, 1:12
6.5mm/.264 - 1:8
.270 Cal - 1:10
7mm/.284 - 1:9
30 Cal - 1:8, 1:10, 1:12
338 Cal - 1:10
 Choosing Your Custom EABCO Twist Rate
  You can special order your choice of rifling twist rate when you order a made-to-order Encore Accuracy Barrel, or made-to-order Model 97DRifle.
  We have standards we recommend for various chamberings so you don't have to figure this out yourself. But if you'd like to know some guidelines and reasons, here they are: 17 Caliber: Use 1:9 for centerfires. 22 CF (Centerfire): 1:7 is only for the heaviest bullets. 1:12 shoots 40-50gr bullets accurate in 223 and up to 55gr, accurate in 22-250. 1:14 is only for the lightest bullets. 6mm/.243: Use 1:8 for 90-100gr bullets. 1:10 for 75-85gr. Use 1:12 for lightest bullets (ie. 58gr in 6PPC). On 30 calibers, a 1:10 twist is the best all-around. We DO build a few 30's in 1:8 twists for folks who shoot the heaviest bullets. 308 shooters prefer 1:12 for 155 gr bullets. The rule of thumb with twist rates is this: It is better to err on the side of too fast of a twist rather than too slow.
  Choice of twist rate is only available when you order a custom barrel or gun made by E. Arthur Brown Company. Thompson Center barrels have standard twists...

Thompson Center Factory and Orig Custom Shop Twist Rates - Scroll Down
  To the best of our knowledge, these are the current twist rates in Thompson Center barrels that come as factory standards and from the TC Custom Shop (Fox Ridge). We supply the full range of factory barrels... Click Here for factory barrel prices. We also supply the TC Custom Shop made-to-order barrels... Click Here for Custom Shop barrel information.
 

Click Here For the Main T/C Menu

All 17 Centerfire 1:10
All 22 Centerfire  1:12
All 6mm/.243  1:10
All 25 Caliber  1:10
All 6.5mm/.264  1:8
All .277 Caliber  1:10
All 7mm/.284  1:9
All 30 Caliber 1:10
All 338 Caliber  1:10
All .375 Caliber  1:12

General TC Twist Rates by Chamber... Scroll Down for Special Pistol Barrel Twist Rates.

17 REM 1:10
17 MACH IV 1:10
17 ACKLEY BEE 1:10
17 K-HORNET 1:10
204 RUGER 1:12
22 LR 1:15
22 HORNET 1:12
22 K-HORNET 1:12
218 BEE 1:12
221 REM FIREBALL 1:12
222 REM 1:12
222 REM MAG 1:12
223 REM 1:12
223 ACKLEY IMPROVED 1:12
22 PPC 1:12
22 BENCHREST 1:12
22-250 REM 1:12
22/250 ACKLEY IMPROVED 1:12
225 WIN 1:12
220 SWIFT 1:12
6MM REM 1:10
6MM BR REM 1:10
6MM TCU 1:10
6MM PPC 1:10
243 WIN 1:10
6MM-06 1:10
250 SAVAGE 1:10
250/3000 ACKLEY IMPROVED 1:10
256 WIN MAG 1:10
25-20 WIN 1:10
25-35 WIN 1:10
257 ROBERTS 1:10
257 ROBERTS ACKLEY IMPR 1:10
25-06 REM 1:10
25/06 ACKLEY IMPROVED 1:10
6.5MM TCU 1:08
6.5 BENCHREST 1:08
6.5X54 MANNLICHER 1:08
260 REM 1:08
6.5X55 1:08
6.5X284 1:08
6.5 REM MAG 1:08
264 WIN MAG 1:08
6.8MM REM SPC 1:10
270 WIN 1:10
280 REM (7MM EXP REM) 1:09
280 REM ACKLEY IMPROVED 1:09
284 WIN 1:09
7MM TCU 1:09
7-30 WATERS 1:09
7MM BR REM 1:09
7MM-08 REM 1:09
7MM (7X57) 1:09
7MM REM MAG 1:09
7MM INT 1:09
30 CARB (M1) 1:10
30 HERRETT 1:10
30-30 WIN 1:10
300 WHISPER 1:10
7.62X39 1:10
300 SAVAGE 1:10
30/40 KRAG 1:10
307 WIN 1:10
308 WIN 1:10
308 ACKLEY IMPROVED 1:10
30-06 SPRG 1:10
30/06 ACKLEY IMPROVED 1:10
300 H&H MAG 1:10
300 WIN MAG 1:10
32 H&R MAG 1:10
32-20 WIN 1:10
32 S&W 1:10
358 WIN 1:14
338 FEDERAL 1:10
338-06 1:10
338 WIN MAG 1:10
38 SPECIAL MATCH 1:14
357 MAG 1:14
357 REM MAX 1:14
357-44 B&D 1:14
357 SIG 1:14
357 HERRETT 1:14
35 REM 1:14
35 WHELEN 1:14
350 REM MAG 1:14
375 WIN 1:12
38-55 WIN 1:12
375 JDJ 1:12
375 H&H MAG 1:12
405 WIN 1:14
41 REM MAG 1:20
416 RIGBY 1:14
44 REM MAG 1:20
445 SUPER MAG 1:20
444 MARLIN 1:20
45 AUTO LH 1:16
454 CASULL 1:16
460 S&W 1:16
450 MARLIN 1:20
45-70 GOVT 1:20
480 RUGER 1:18
50 AE 1:20
500 S&W 1:20
209X45 1:28
209X50 1:28
209X50 Custom Shop 1:48
12 GAUGE 209X12GA SB
12 GAUGE 3" (RIFLED) 1:28
20 GAUGE 3" SB
20 GAUGE 3" (RIFLED) 1:24
28 GAUGE 2 3/4" SB

TC Pistol Barrel Twist Rates

414 SUPER MAG 1:20
40-44 WIN 1:20
45 COLT LH 1:16
45 COLT-410 LH 1:16
450 MARLIN 1:14
45-70 GOVT 1:14

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2001-2012 E. Arthur Brown Co., sales@eabco.com, 4088 County Road 40 NW, Garfield, MN 56332
ph. 320-834-3000, FAX 320-834-3002 , Orders Only Toll Free 1-800-950-9088