Just started loading shotshell 12 gauge. I've got 4 extra pounds of hodgdon universal so i started there. Here's my load info. 2 3/4 federal plastic hull. Waa12 wad. Cci 209 primer. 25gr of universal. 1 1/8oz lead shot #6. Shell loads and crimps well. The problem i'm having is when i fire them it leaves a horrid mess in the barrel. Unburnt or partial burnt powder. According to the load data 25gr is the max load. From reading other posts the most common remidy was to increase the charge. I stopped at the max load. Im out of ideas since im new and don't know all the tricks. I've read that others don't have any issue with universal.