Cast receivers are used now because the reduce the labor and machining needed to make a gun. Ruger has been a pioneer, not only making their own but others for Montana and while many don’t know this they made the frames and slides for the Interarms and Walter USA ppl and ppk/s.
Fwiw...I’ve had one catastrophic case rupture and it was in a 77. Gun never even flinched. GREAT rifles
