The M1 Garand offers lots of fun and potential for the CB experimenter.
There's some great comments already posted!

Another approach is what I might call the glorified single shot approach.
-Get an old gas cylinder plug and drill a hole out the front to let the gas just blow out (a lathe or drill press is helpful, but not required.)
-Use a single shot adapter in place of the usual 8 rd. en bloc clip.
-Load, shoot, and cycle the bolt for each shot.

This really saves wear and tear on brass, and allows the use of neck sizing if you keep your loads light.
It's also great for low/no recoil practice to learn the trigger.
It's also quick and easy to switch to normal operation.
If you don't cast, this also works with swaged roundball loads or light loads using the Speer plinker bullet.

Enjoy,
Jim

PS: did I mention this method's cheap?