I normally shoot H4350 with 105 VLD's and Federal 205M's. Since I had a jug of StaBall and Hodgdon had data, I decided to give it a whirl. I loaded 38.0 up to 40.0 in .5 grain increments. 38, 38.5 and 39 grains had the classic click/boom hang fires, with it progressively decreasing with the higher charges. The 39.5 and 40.0 charges seemed to be normal with no hang fires. No pressure signs or heavy bolt lift all the way to 40.0 grains. I'll wild guess it's time to switch primers. I have WSR, Rem 7 1/2's and some 450's on hand. Any opinion or experience on which to go with first? And btw, it was 50 degrees outside temp, so not really cold.