80gr eld-m (Bryan Litz tested this bullet truce bc is .505) I used the .505 bc out to 1k and it’s held true. Next would be the 88 Eld-M .545 bc hold true to 1k as well. You could throw the Berger 80.5 into the mix very good 600yd bullet. The 75 eld-m is a good one as well.
And the 88 stabilizes in the 1 in 8" twist?
Personally, I wouldn't ever shoot an 80 in a 9 twist for anything I valued. I wouldn't go to a match with that combo, I wouldn't even drive 20 minutes to the club to try it. Yes, I've read about 1 or 2 guys getting away with it, but that is not the norm. 77s are hinky enough in a 9.
An 8 is good enough for the 75, but I would never even bother trying the 88 in an 8. The slowest twist I'd bother to try is a 7 with the 88.
Oh, ok. That is what I thought.