I got a 300RUM with a kreieger barrel, and best I can do is 40fps spread and that was with IMR4350. And some days can't repeat that. With Re25, I get some monsterous velocities but large vel. spreads like 60fps or more.

I am used to loading for 308WIN, where I can get some real low spreads like 10fps.

I have a 26" Blackstar barrel on mine, with 95gr of Rel 25 and 180gr bullets, it's been no more than 30fps.

Dunno if you'll ever get to 10fps spread with the big powder burners.

BC, what kind of groups were you getting with the 4350? I couldn't get mine to group well with it and I was also getting some major pressure signs.

bigcountry, try Retumbo. It has been very consistant for me.