ORIGINAL: Wild Outdoorsman
I'm no expert, but do know a little about metal. Maybe it's the grade of metal or has to do with pressures. The 30/30 is an old cartridge and many old guns were made for low pressures, under 30,000psi.
I would have to check with others though. James B, BigBulls and Big Country are some good gun guys for info. I'm a flatlander who loves rifles and shooting them.
True. But it has always operated at about the same pressures as it does today, and at least the Winchester rifles chamered for the .30 WCF have always been made from "NICKEL STEEL ESPECIALLY FOR SMOKELESS POWDER".