for what it is worth, the so called "magic formula" that my rifle likes is 27.0 grains of Hodegdon Varget with a 40 grain v-max hornady bullet. i use cci std smalll rifle primers and LC92 brass. my rifle is an H&R Handi-rifle single shot, with a 1 in 12 twist rate. and that load was worked up from a much lower starting point. i would recommend you back that off at least 2 grains, and work up from there. there i no load worth destroying any single human part for, let alone a firearm. i hope you find a good load, i find it a very rewarding hobby.