My 1 in 9 twist on my factory Savage BVSS had no problem stabilizing any 80 grain bullet put thru it...so don't let that handicap ya if that is what yours has...

but if you are going to do a barrel, a 1 in 8 cost no more than the one in 9.... so go with the 1 in 8...or you can do what I did with my first 223 fast twist and go with a one in 7... I did that since that is what some of the military AR barrels where twisted at...so I thought what the hell...

The rifle got given away, but kept the barrel and had it rechambered to a 22.250....