Marlin Junky
03-19-2011, 01:56 PM
After trying several boolit designs it's becoming apparent my Pre-64 M70 in 30-'06 with its generous dimensions in the neck area and kinda tapered throat (.310-.311) likes bore riders measuring .301" to .302" on the nose. I've also had some decent results with RCBS 30-165-SIL at this velocity level but the c309-170 has produced the best group so far.
The load was 22 grains of surplus 4759 and the velocity average for 7 shots was 1852 fps. The two foulers were not shot at this target. Boolit weight was 181 grains fully dressed and the alloy registered between 13 and 14 on the Lee scale (probably closer to 14 than 13). A bit more experimenting and this load's gonna be tested at 150 yards.
5 rounds, 75 yards:
Should have mentioned that the boolits were heat treated at 420F for an hour and quenched in ice water. My heavier than WW alloy is more like BHN 12 a couple weeks after casting when just air cooled.
The load was 22 grains of surplus 4759 and the velocity average for 7 shots was 1852 fps. The two foulers were not shot at this target. Boolit weight was 181 grains fully dressed and the alloy registered between 13 and 14 on the Lee scale (probably closer to 14 than 13). A bit more experimenting and this load's gonna be tested at 150 yards.
5 rounds, 75 yards:
Should have mentioned that the boolits were heat treated at 420F for an hour and quenched in ice water. My heavier than WW alloy is more like BHN 12 a couple weeks after casting when just air cooled.