I got my rifle the other day. Loading up some loads to try and I'm not gonna be able to seat anything closer than about 50 thousandths of the lans Bc of magazine length. It was a rem 700 7mag. My question is can you install a mag box for the ultra mags and get more room? If so does it require any modifications? I've read of the wyatts box I just didn't wanna have to do any modifications.