Not saying I want to shoot the 150s all the time. Just wondering on the changes in the twist from 1:10, 1:11 and now 1:12. What weight would the 1:12 start to not stabilize? I'm looking to have a barrel built, but not sure on twist rate yet. I'm figuring on using 115gr area mostly, but if as technology often does they start making a heavier bullet that can be loaded in the 6.8 I'd like to be at least able to shoot it without having ovals at 100yards.
I'm assuming the move from 1:10 to 1:12 was to ease pressure since they are dealing with faster powders, but I like to keep and idea of what I'm giving up when I decide which way I'm going. If I can still push out 130 grainers without issue that may be enough for me to decide to go 1:12. The 5.56 started out around 12 then went to 7 and back to 9 then settled down around 1:8 if I remember my history right. Doesn't mean that 7,9 and even 12 don't shoot 5.56. It just that there will be a better twist for all around choices of bullets in that calibre.
If I was shooting 40gr in 223 then I might want a 1:12, but if I wanted to shoot 55gr to 80gr I'd probably have 1:8
Just coming from a 308 and 223 world the 1:12 seems a little slow and I'm looking to see if it will fit my long term needs for this barrel. Seems that most focus here has been on 80gr to 115gr recently. I'm just looking for some answers to the question if I decided to shoot some 130gr to 150gr aside from bullet length would my barrel stabilize the bullet with 1:12?
Why not step up to a .270 if you're wanting to shoot the heavier bullets?