You seem concerned with a 1 in 9 twist but don't mention why.
A 1 in 9 twist is actually a very good choice for a 'do all" Ar. Bushmaster has been using 1:9 for years. The slower 1:7 or 1:8 are geared towards shooting heavy bullets (75gr+ ) at long ranges. They however, loose something if you want to shoot lighter (say 45 gr) varmint bullets. All else aside, unless you are going to be shooting the heaviest bullets/ past 300 yds on a regular basis, the 1:9 is fine. ( Keep in mind that many bolt action 223's are 1;12 or faster. )
FWIW, I shot a bushmaster in 1:9 for years and never felt held back.
I beg to differ with you sir, For the last few months I have been loading 40gr and 45gr ballistic tip/V-max bullets to run in my Sport with the 1:8 5R barrel. They shoot like little lasers and haven't been overly affected by crosswinds. I had heard that the 8 twist wouldnt shoot the little bullets but they shoot great and are great for both punching paper and prairie dog hunting.
