Discussion Starter · #1 ·
Hey y’all, recently I started building a big bore AR in .458 socom, I’ve been buying my brass from the same guy for a while and he happened to give me some .458 socom cases, I’m having a hard time finding anything on trim length for these cases, starline says their cases come between 1.569-1.576, some of my cases don’t make the 1.569 mark after resizing and I’m trying to figure out what the shortest I can run them at without issues. The cases them selves look fine as far as stress signs go, id like to put them to good use if I can. Ive heard the socom can be tricky when it comes to this. I have a case gauge coming soon, I won’t chamber without it, also I have a pound of LiL gun, I’m gonna play around and work it up, but what loads have worked for you guys best? Bullets I’m shooting are Hornady FTX 325 grain. Hope you guys can help!!!