I think it will be ok for a 30-30. I have a 6 * 30 BSA on an old marlin 30-30 I hardly use. It works fine, I dont think I would trust one on any thing bigger. I use this old gun as a loaner to friends, and it has kill plenty of deer. No one has complained. I went with the BSA because it was cheap, and It wouldnt bother me if a friend broke it.