Thanks for all of the advice. I think I got it worked out. I'm going to work on some of the lighter loads listed in the 'Trapdoor' section, and work up to the others.
I'm looking for a comfortable load to shoot, and know that it can get out of hand quickly if I load it too hot.
The last 1895 Guide Gun I had almost broke my collar bone one morning while I was shooting Buffalo Bore cartridges. I don't want that to happen again.