I would also recrown. If you are going to do all that, might want to consider a really quality barrel. I know I would if I was going to do all that work. I have a krieger myself on my 300RUM and love it. Modifications should be very minimal. But remember a 300RUM has alot of freebore (like .2"), but not near like a weatherby. If I had to redue my 300RUM, I would find a smith to put me a custom throat on the gun without all the freebore.