Be certain that you want to do this. Factory Rugers in 350 Rem Mag do not feed worth a hoot!
I have seen one that would not feed at all.
Would be interested in hearing if anyone has one that fed properly without some tuning.
Ted
I agree - or even slightly more maybe. I get 2475MV with a 250gr or slightly better from my 18 1/2" M600/350RemMag using the right powders. The 350RemMag loses little in shorter tubes - http://www.35cal.com/loading.html#600As for the ballistics, I would still expect 2300 fps with 250 gr bullets out of that stubby barrel. - dan