Re: 7mmRM or 7wsm??
Why go through the trouble...just use the 300WM magazines for the 7mmRM. They are the same case. I've been running my GAP built 7mmRM sitting in an AICS chassis and utilizing 300WM magazines. I've had "0" feeding issues, never touched the feedlips, never messed with the ramps, nothing. It works great and personally given the brass choices and the desire to run the wsm in a LA anyways, at least to utilize the best potential bullet position...don't see the need for the wsm.
The only thing I don't care for about the 7mmRM is the belt. However, once you get used to it, it is really not a big deal. Right now I'm on my 6th reloading of my nosler brass and haven't had any sort of issue with it.