Re: need help- off the shelf gun??
I have a Remington m700 in XCR that I free floated and bedded in the factory stock and it shoot really well. I have shot many a 3 shot groups under 3/4" at 200 yards and am cansistantly within MOA to 700 yards, but thats me. I got lucky.
I think that It would be foolish to spend the extra coin on a 7mm when you have a 300 RUM that is already better ballistaclly. If your dead set on a Senduro I would sell your 300 RUM and get a 300 RUM in the Senduro (but I would probably keep what you got). You dont need to spend top coin on a rifle to get a good shooter. I would also think about optics that you can dail, hold over is no good (unless your old school and are good at it). Ohh, my XCR is a .338 RUM.