Went out to the range recently and tried to chrono some 230gr bullets I loaded. I actually tried loading 5 different grains of Clays powder using 230gr Bear Creek Moly bullets. 3.7gr, 3.8gr, 3.9gr, 4.0gr and 4.1. The recommended maximum load is 4.0grs when using 230gr. My goal was to get as close to 170 power factor as much as possible. The formula is (Bullet Grain x FPS) / 1000.
I started with the lowest of course 3.7gr, but before I started, a buddy of mine, Tavis, told me that he shot 3.5gr out of his 5” Kimber and got a 172PF rating. I guess I should have downloaded my rounds more, but here goes:
|3.7 gr||3.8 gr|
Tavis was right. It looks like I have to load down to 3.5 or 3.6 gr and chrono the rounds again next week.