12-06-2015, 01:27 PM
I have 16" 1:9 twist and a 20" 1:9 twist 6.5 Grendels. I have shot the 16" out to 800 yards and the 20" out to 1000. I was using 123 grain A-Max factory in the 16" and 123 grain Nosler CC in a hand load in the 20". I think you'll be OK but the only way you'll know for sure is to try it. I'd be curious if the 1:9 could stabalize the 129-130 grain 6.5 bullets.

