Hi - I am trying to develop some smokeless loads for brass 20 gauge shells. I first loaded some plastic low base shells (5 of them) with 14.5 g Unique, felt wads and 3/4 oz of 7.5 shot. They shot just fine a bit on the light side. So I thought that would be a good starting point for the brass shells. So I made up the exact same load except I used slightly bigger wads because the brass shells are bigger. Both plastic and brass were sealed with glue. So I loaded up 5 rounds - all barely went pop not even clearing the wads from the barrel. Any ideas what went wrong? - thanks