You should have a 26 inch barrel to get the optimal preformance out of the big mags like the RUM, STW, and WBY. If you want to rechamber, you would be wasteing your money rechambering a factory barrel. Purchase a Krieger, Hart or Lilja and have it chambered in what you want or start from scratch using a Savage action. When you rechamber you have to keep in mind the bolt face if you want to reuse the bolt w/o having it machined. The RUM will take machining as will any of the WSM based cartidges. If the gun shoots good, leave it be and put up with the 100 fps loss in velocity IMHO. Good luck
I used to re-load but now I "hand-load".
-- Well, at least I try
Last edited by britz; 12-14-2007 at 12:22 AM.