The search engine on this forum is least to be desired. Sorry if this has been brought up before. I recently held a 300 and 338 RSM and I really liked it. I am a fan of iron sights but do like the option of see thru mounts so I can use both. Plus its a pound lighter. I could add sites on my current M77 .338 also, but like the short barrel so far. Found some weaver style sights for an M77 Hawkeye on Midway USA so I could use both. The ballistics appears to be about about the same between the RSM vs normal magnums. Does anyone have a RSM in .300 or .338 and if so, how do you like it? Also, has anyone used the see thru mounts on a magnum rifle before? Not sure if it will hold well. I currently have one on my Win Mod 70 in a 3006 and I love it. Had it for 25 years with same mounts.