I'm working up a load for my 243 Win using H4831sc and the Hornady 90gr CX. Working up from 42.8gr to 46.2 in .2 increments. I noticed at about 45 gr or so when seating the bullets I could hear some crunching as the seater bottomed out. I expected the upper charge weights to be compressed but I was somewhat surprised to hear powder crunching so early in the load range. I noticed the COAL and OAL to ogive both increased slightly at the last 3 or 4 charges. My COAL goal is 2.71" but the 1st 14 or 15 rounds settled at 2.708-2.709. I think the ogive number was about 2.15 and ended up at about 2.17 at the upper charge weights. Is it unusual for a compressed charge to resist the seating depth of the uncompressed charge weight? I have seen some folks loading as much as 48gr of H4831sc in 243 win, but I don't see how. My powder at 46.2 was at the top of the neck taper.