Lonegunman. I have three of the Ruger RSI's, all in .308 Win. Nuff said?
No, as has been mentioned, they are not sub MOA guns, although I do have one load that qualifies.
It will depend upon which bullet weight you plan on using.
The first one I bought, I got cheap, because the guy that had it felt the rifle was inaccurate. He was honest enougfh to say that the best he could get was 3.5 inches at 100 yards. I got the brass and the rest of his handloads and dies along with the rifle for $300, complete with a Redfield 3x9 scope.
I loaded up a box of 150 gr., 165 gr., and 180 gr. bullets for the gun (actually two boxes of 180 gr. bullets, one spitzer and one round nose.)
The 150's did 1.5 inches, the 165's 1.25 inches, the 180 spitzers (what he was loading) did 3.25 inches, and the round nose 180's did .75 inches.
I settled on the 165's as a general all round load for the gun.
My wife used the rifle on a deer hunt and proclaimed it HERS! I told her I'd buy her one of her own, which I did. A third came along at a good price as well, so I bought it.
I do not post loads on forums, but the bullet I settled on is the 165 gr. Speer spitzer flat base. With the load I use, it produces 2550 FPS from that 18.5 inch barrel. The same load does 2610 FPS from a 22 inch barrel .308 that I have.
Why these rifles don't like trhe 180 gr. spitzers is something beyond me. Maybe a different powder might do it, change in bullet brand? Who knows?
FWIW. That Speer bullet hit a Mule Deer about 250 yards out, uphill from me, broke the spine, angled off to cut three ribs, and the went back to a back leg breaking the leg bone before stopping. Bullet was fired from the RSI.
I very well could be that an RSI could become one of your very most favored rifles. Is has done so for me.
Paul B.