Finally got some rounds down range, got the characteristic horizontal/vertical string at 59.5 and 60 grain. I'm going to stick with the 60 and adjust seating depth to tighten the string. Looking at case head expansion I could probably go to 61 grains. At 60 I'm averaging 2.5 thousandths expansion. Need to double check the expansion on factory loads, but no observed primer flattening. More to follow.
