Ive not tried the 77 gr. OTM in my Contender, as it has the 1-12 (I believe) twist. I look forward to trying some 62 gr. Federal barrier blind/ bonded SPs though. They're .223 pressure. If they shoot well with that twist rate, they should do well. They hold together very well and expand down to 1800 FPS.

John

But for the grace of God, there, I go.