D Scott
Well-Known Member
I am getting started into reloading now for about a year, I dont have a chronograph yet but am working off the reload data in the reloading books to estimate bullet speed, (MV) the test barrels are 24 " mine are 26 " I'm shooting a 260 rem, and a 22-250 is there any rule of thumb to estimate velocity from 2 inch extra barrel ? Thanks in advance Scott