I recently got into 3 gun and picked up a stoeger m3k. With the lack of matches I figured it is a perfect time to practice quad loading, and picked up some dummy shells off Amazon. However the shells leave much to be desired in fit and finish as the brass on them is larger and poorly formed when compared to live round. This is causing hang ups, slowing progress. Rather then playing a guessing game and randomly ordering other practice shells, I figured someone might have a good suggestion.
What shells do you use to practice?