I'm going to have a 700 SPS .300 WM rebarreled to .270 Weatherby Mag. I'm intending to shoot the longer bullets (150g LRAB, 145g ELD-X, etc.) the shortest bullet I would opt for is the 140g NAB. Standard twist is 1:10. I've read where the ELD-X recommends 1:10 or faster. Should I spin the barrel a little faster say 1:9.5 or 1:9?
