I have two rifles that were made (357 & 30-30) in the 1980's that basically are Toppers and both are fine with the normal factory
loading. The new SB1's are sold in 357 &44mag and I have a 45/410 mounted on one of them that is fine. I also have a H&R Handi
Gun( Also 80's ) in 20ga & 44mag that has no prob;lem. No high pressure cartidges should be attempted Fred