When cleaning out my loading cabinet a while back I found 10 .30-30 rounds I had loaded back in the 70s. They were made up with Reloader-11 powder which you can no longer get. I figured I'd just shoot them to recover the cases. When I did, about 6-7 out of the 10 rounds resulted in case splits. I wondered at the time if the cases were too old and/or work-hardened. Obviously I tossed the remaining cases. All were Remington cases.