I'm looking at loading 12ga 2 3/4 (1oz or 1 1/8 oz lead shot) for clay shooting out of an auto loader. I would like to use titegroup powder if possible since I have a decent amount. The problem I'm running into is that I can only find Cheddite primers and none of my published load data list that combination. Does anyone have any experience loading shotgun with titegroup? Are cheddite primers interchangeable with another brand of primers?