Mine doesn't shoot great with any of the factory ammo I've tried in any weight, that's why I have some handloads made up for it. When I got mine in Oct '04, there wasn't any brass available to speak of, but I got plenty now from trying all the factory loads
, both the silver box and white box from Win, Rem, Hornady and HSM. Of those, the Hornady 32gr shot best at about 1½".
Mitchell's load is a max Hodgdon book load of BL-C2 and the 40gr Vmax in Hornady brass, I'm working up to that on my next range visit. Seems to me the COL I made em was 2.280".
Tim