The Berger 80 flatback absolutely SMOKES in an 8 twist. In fact, it is really all you need to shoot if you are under 400 yards. Many of the big boy 6bra benchrest shooters were going to the 80 grain bullet in short range specifically because it can buck the wind at 200.
For the average guy buying a $249 prefit, you could not shoot much smaller than a Berger 80 in an 8 twist. Heck, I have even shot them in 600 yards matches and they will shoot 1" of vertical at 600. The 80 Sierra Blitz is also quite good as is the 88 Berger, 85 HPBT, 87 ELDM, etc etc
There is an entire thread from
@AckleymanII shooting my barrel in 6bra and 70 grain bullets. His review was that it was pretty boringly accurate and very fun to shoot. Not finicky.
The great thing about an 8 twsit is that if you want you would also try heavier bullets, where with the slow twist you are married to a very small range of bullets..Urbanrifleman,