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| .172 |
1:9 1:10 |
For bullets heavier than 30 gr For bullets up to 30 gr. |
| .204/20 | 1:12 | For all bullets |
| .222 Rim Fire |
1:14 1:16 1:17 |
Twist for pistol barrels Standard twist for rifle barrels Special twist for rifle barrels |
| .224 Center Fire |
1:8 1:9 1:12 1:14 1:15 1:16 |
For bullets heavier than 70 gr. For bullets up to 70 gr. For bullets up to 63 gr. For bullets up to 55 gr. For bullets up to 55 gr. driven 4,100 fps or more For bullets up to 55 gr. driven 4,300 fps or more |
| 6mm/.243 |
1:8 1:10 1:12 1:13 1:14 1:15 |
Special for VLD bullets over 100 gr. For bullets up to 120 gr. and VLD under 100 gr. For bullets up to 85 gr. For bullets up to 75 gr. For bullets up to 70 gr. Special for bullets up to 70 gr. |
| .257 |
1:9 1:10 1:12 1:13 1:14 |
For bullets heavier than 100 gr. For bullets up to 100 gr. For bullets up to 90 gr. For bullets up to 80 gr. For bullets up to 70 gr. |
| 6.5mm/.264 |
1:8 1:9 |
For bullets heavier than 130 gr. For bullets up to 130 gr. |
| .270 | 1:10 | For all bullets |
| 7mm/.284 |
1:9 1:11 |
For bullets heavier than 140 gr. For bullets up to 140 gr. |
| .308 |
1:8 1:10 1:12 1:14 1:15 |
For bullets heavier than 220gr. For bullets up to 220 gr. For bullets up to 170 gr. For bullets up to 168 gr. For bullets up to 150 gr. |
| 7.65mm/.311 | 1:10 | For all bullets |
| 8mm/.323 | 1:10 | For all bullets |
| .338 | 1:10 | For all bullets |
| 9mm/.355 |
1:14 1:16 |
For low-velocity wadcutters For all other bullets |
| .38/.357 |
1:14 1:18 |
For low-velocity wadcutters For all other bullets |
| .358 | 1:14 | For all bullets |
| .375 | 1:12 | For all bullets |
| 10mm/.400 | 1:16 | For all bullets |
| .411 | 1:14 | For all bullets |
| .416 | 1:14 | For all bullets |
| .44 |
1:20 1:16 |
For all bullets For low velocity wadcutters |
| .451 | 1:16 | For all bullets |
| .458 | 1:14 | For all bullets |