22 CM barrel twist

[deerhunter628]

I am considering getting a 22 CM barrel made for one of my rifles. I am leaning towards a 19” barrel. I have the following twist options: 1:6, 1:6.5, 1:7, 1:8. Is there a disadvantage to the 1:6? Which twist would you choose and why?

 

[mighteywhitehunter]

Just got my CBI barrel from NSS. I went 20" in their lightest sporter contour in 1-7" twist saami chamber. So far it has shot very well with Hornady 80 ELDX factory ammo. First 20 shots of factory ammo averaged 3110 fps and were .5-.75 moa.
My plan was to shoot the Barnes LRX 77gn and various lead bullets in the 77-88gn range at decent speeds, thats why I went with a 20in bbl and 1/7 twist.
I dont think you need anything faster than 1-6.5" to shoot any bullet currently made.
The potential disadvantage would be if you are really trying to push the velocity envelope with the extra fast twist you may start blowing up bullets unless you are shooting copper monos.