Mine is an Interarms Mark X Mauser in 458 Win Mag. It's in what I believe is a Bell and Carlson synthetic stock with a nice thick recoil pad.
I've polished the bolt working surfaces and beefed up the magazine release spring. Next project will be to add ghost ring sights.
I shot a pig and a deer with it using 350 grain handloads and it worked very well indeed. It's a bit heavy to lug around for such game, but if I ever have a problem with pachyderms in the petunias, I'm ready.
It's reputation is so fearsome that nobody has spotted a single elephant, rhino or hippo in my neighborhood since I got it.