I recently bought a Springfield Armory Mil-Spec 45 ACP.
I am using cast boolits. Specifically Lee 452-200-SWC and Lee 452-230-2R. I am using Bullseye powder currently but have others available.
I have tried loads of 4.6 grains under each boolit and they functioned the gun perfectly.
I currently have 200 rounds through the gun since new.
My question is---How light a charge can I use without having to change the standard recoil spring?
Thanks for your input.