I have some black powder cartridge reloads that I use in my Trapdoor rifle, but they seemed a little too stout for my carbine. I am using a 405 gr. RNFP bullet and 65 grs. of BP. I can remember reading that this was a little too heavy for the short carbines and the government down sized the powder charge. I can't remember what the charge was, can someone help me?
If I down size the charge, I will have to use some form of filler I suppose. I know some of my CAS parts use Cream of wheat, but a friend said there is something much better. If so where can I get some of this stuff?