I am going to use CMMG for a upper and their barrels are 1/7 twist. is that good. does only certain ammo shoot accurate through it?
Posted: 12/4/2008 5:44:42 PM EDT
[#1]
I would want and have 1 in 7" twist. Mine is a CMMG upper. It should shoot everything fine with the exception of some of the very light varmint bullets running fast. I haven't tried any of those.
Posted: 12/4/2008 5:46:18 PM EDT
[#2]
1:7 twist is good for anything 55 gr. and higher. I've never shot anything lighter but I've seen posts to the effect that really light rounds might not do so well.
Posted: 12/4/2008 5:56:21 PM EDT
[#3]
thats good to hear I dont plan on getting any les than 55 grain
