I have a great load for my 11 year olds 7x57 with 139gr Hornady interlocks, and IMR3031. I’m currently out of 3031 so we are testing out IMR4320 with the same bullet. COAL is at 3.005”, starting with 36.0gr of 4320 and doing .5gr increments up to 37.5gr. I’m trying to keep the recoil on the more moderate side.

He shoots the 3031 load consistently into 1” groups, so we are looking for the same (or at least close) out of the 4320.


JTD