I've never gotten pistol/shotgun powders to cycle a semi with cast bullets without extremely high pressures. I stick with reduced loads of fast-medium burn rate rifle powders. SR-4759, 4198, 4895, Benchmark, IMR3031, etc. have worked well for me in several rifles but I've never loaded for a Garand before.
I've had good luck using the 60% rule with H4895 and loading up till the action cycles. I've got some loads that will only cycle the rifles above certain temperatures because they're so borderline. No problem getting bullets stuck in the barrel; just lacking gas port pressure to cycle.
I'm currently loading cast for an SKS, 10.5" AR, and a Norc M14. The Norc load uses H4198 1-2gr below starting load (I forget exactly) and the Norc likes H4895 10-20% below the starting load. I forget what the SKS load is.