I was shooting an uberti 36 cal 1851 navy for the first time today. I was shooting 20 grains of powder and it felt like it had no recoil and sounded weak. I know it had some because the caps fell off. So there are my two concerns. What is the correct powder load and the caps are #10 so are there smaller caps for these. I have no documentation from the manufacturer so I am guessing here. Any suggestions I would love to hear.