I went down the rabbit hole looking at longer mags to accommodate that. Most required another chassis which I considered but I already started off loading them .002 off the lands and so on and ran into the same problem.I was thinking maybe if you did a ladder 20 off and 50 off to see if the load would be happier at a longer coal. But the mag is what? 2.260”? They make mags that allow a longer coal.
I started off with 75 grain Berger’s. Ended up in the same situation after 100 rounds of attempting load development so idk why I suck so bad.