Ive been playing with some different bullets, I had laying around, in my K-31. I’ve only been using IMR4350. So far I’ve tried Hornady 165gr BTSP, Hornady 180gr SP, and Nosler 180gr ballistic tips. Out of those three bullets Ive had the best accuracy with the Hornady 180gr SP, next was 180gr Ballistic tip, and lastly the Hornady 165gr BTSP.