Originally Posted by firelt
After a close inspection, the winner is: bent operating rod! Thanks for all the help, everyone. Since I reload my own ammunition, does anyone know a reliable source for good load data for the M1? I'm not going to replace the op-rod just so I can bend it again with a load that's too hot.
147-150 grain bullets, 4895 powder, MilSpec Primer**
like Remington 9 1/2 or those CCI special order types. GI cases. Good to go
** To prevent "slamfires"