I love my 336 with the see thru mounts they have never been a problem for me. I have a 3x9 40mm on it at it works great. Try the hornady leverevolution ammo for your 30-30 it works great. My 30-30 have killed a pile of deer and will continue for year to come. I have a tasco from wal-mart that I got before I knew any better but it have never moved from zero and has new let me down. I just wish it was a little clearer.