Warning: This data is safe in some of my handguns. All but one have tight tolerance chambers.

I use Lapua brass, Fed match primers, H-4350, and a number of bullets weighing from 130-142 grains. Typically, 140-142 grain bullets though.
Since my throating and chambers are slightly different from gun to gun (one MOA Maximum too), I use from 49.0-51.5 grains of H-4350 for the 140 class bullets.
Only one XP has the 51.5 grains-I get ejection marks on the head of my cases, but extraction and case life has been good-It is also super-accurate in that XP with the 140 A-MAX's. Typically, I engage the lands at the beginning of my load development. again, every gun is different.
Hope this is helpful.
Warning: This data is safe in some of my handguns. All but one have tight tolerance chambers.