Not sure if this is the right place. I acquired a Holland and Holland double rifle. It is a 500 bore made in 1886. The load is engraved on the action; 5 dram, 3-1/4" with standard bullet. I sent an email to H&H asking what a standard bullet is. Anyone have any information on coming up with a load? I have handloaded for a long time, but having a problem with drams.
