So for my 358 Winchester that Tim Malcolm built, I was working on an easy shooting load for fun/possible small game load. I had come across a promising load so today I loaded up some and decided to see how 30 rounds group. Here are the loaded rounds before heading to the range:
Load data was as follows: 1x fired Rem 308 brass formed into 358, CCI 200 primers, 12.1 grns Unique powder, and the Arsenal 358-158 bullet from the recent group buy. Mine drop at right around 162 graind with the gas check installed. Bullets were powdercoated with Smokes powder, a mix of the dark blue and the traffic purple to make a dark purple. Here are the results of 30 shots at 50 yards. I did not give time for the barrel to cool between shots, and there was a 5-10 mph breeze. So with cooling the barrel plus a calm day, one could probably tighten the group up pretty easily. The shots tended to go higher as the barrel heated up. So here is the pic: (grid is 1/2 inch squares)
I am very happy with the results. This was just fun shooting plain and simple!