As for the older type rifles I'm not sure of the strength but as already mentioned there are several on the market +p rated. I have put quite a few rounds through a ruger #1 stainless laminate open sights and was/am very impressed even with the anemic remington 405 gr factory loads. Recoil was negligible and accuracy was excellent. I have a friend that loads his Marlin lever gun to the extreme and it shoots great although recoil is immense.