I have a Leinad double barreled BP deringer. You know, those ugly ones with the black powder coat finish. Never thought much of it until I shot it over my chrongraph today. Loaded with a .433 dia ball and a .015 patch on top of 25 grains of 777. It clocked in the mid to high 600's generating an averag of 123 ft/lbs of pressure. This makes it a pretty deadly little pop gun. I'm discovering that 777 is the way to go with these little hideout guns.
Don
Don