...and a friend has a Cadet fitted with a Ruger Mini-Thirty barrel (.308 cal) chambered for the .30-30 and it safely shoots and ejects Winchester factory loads all day long.
Strange, my Mini-Thirty is chambered for the 7.62X39 cartridge, which uses a .311" bullet. Surprising that a .30-30, with its .308" bullet would shoot accurately in such a barrel.