I have a custom 7mm that a gunsmith ground the rear 1" + on both feed rails to try fixing a feeding problem with longer handloads. His grinding didn't work and it turns out that wasn't the problem (it's now been fixed with, among other things, a stronger magazine spring). Anyway, I'd like to get those feed rails welded and then stoned/ground back flush and smooth. The rails were left so rough I can see wee bits of brass under the feed rails. We have a huge shortage of gunsmiths in Alberta. Can a good welder do this? What should be done to prevent heating/warping the action? What's the process - MIG, TIG or ? Any help here would sure be appreciated, 'specially from someone that's had welding like this done. thanks.