I have started a test between Heat Treated bullets and Air Cooled.
Rifle - Ruger #1 in 45/70
Bullet - 430 gr GC 75% FP (Mountain Molds)
Allow - WW
Cases Star line, Primers CCI, Powder 2400
I started out and worked up a load with water dropped and BRN @ 23. Starting load in Lyman manul. One load came up right at MOA.
Second Load Air Cooled (BRN @ 12+), just before I reached the load level with HT the groups went sub MOA and the next 3 sets of loads (higher then the charge with HT) are still better then the HT groups around MOA.
Velocity is in the low to mid 1600 range.
Anyone else come up with different results????
Drew