| coll416 |
| (.275 member) |
| 29/12/16 07:49 PM |
Re: 9.3mm/ .366 bore
|
Guys
My Lothar Walther barrel has a 14.2" twist rate & stabilises 320gn Woodleigh RN easily shooting 1.0"groups at 100.0m! The Greenhill formula indicates a 15.5"twist rate for 1.45"bullet length!!!