I've got a bunch of formed brass for my grandfather's 22 R2 Hiwall. Some is loaded, and it is very old - I don't think he continued reloading after dabbling with it in the 1950's. A lot of the loaded stuff has evidence of cracked necks on the brass, but the empty brass looks good. Can I do anything to try to save this 70 year old brass? It's based on a 25-20 single shot case, not impossible to find anymore, but expensive.....