What’s your pet load for 22-250 using 77 gr TMK’s? My rifle is a 1-8” twist NULA.
Not much help with the TMK, because I haven't been able to find any. You are a lucky man Les, if you have a stash of them. I've been running the 77 SMK through a skinny barreled Tikka T3 lite:
Load data:
77 SMK
30gr AR Comp
Lapua brass
BR2 Primer
2.480" (.020" off lands)
Disclaimer: This load is safe in my rifle, it may not be in yours. Work up.. This load will shoot .3 moa for 5 shots at 100 yards in my Tikka. I'd also be very tempted to try StaBall 6.5, as I have had very good luck with it shooting 69gr pills. YMMV..