Until recently, I’ve only shoot 200ABs from my 26” barreled 10 twist 300rum. It shoots ridiculously good. For some reason I can’t leave well enough alone, so I picked up a couple boxes of 230gr otm tacticals. I found accuracy without pressure at 3095fps average with 91.5gr of N570 and low single digit SD/ES. I am at 4000ft altitude, though. You should look into this combo. The 230s have been popping up recently and N570 was available for a couple weeks not long ago, so there should be some around to trade/buy for.