Re: Feeding issues
I can tell you what to do but proceed at your own risk. This comes from years of experience dealing with large diameter cases in 700's. The geometery of the magazine in conjunction with the feed rails do not allow for the cartridges to lay closer to the horizonal plane. They are more vertical and will not stay under the rails which are not machined for that cartridge to start with. The way they are machined they hold and guide the cartridge towards the center, not tucked under the rail, and then you're launching cases out of the action. With the action turned with mag well pointing up look at the rails. Starting at the front the rails have to ground thinner, almost to a knife edge, and the angle laid back. Also tapered from front to rear helps keep the case head under the rail as the bolt is closed and the case enters the area in the receiver ring.
Wish I could be more helful but it's as much by feel and look as anything.
