Just finished several boxes of 12 Ga 2 1/2 inch shells for my old doubles and used for the first time a new trimmer from Ballistic Products. This gizzy is spring loaded and trims old paper hulls clean and neat with just a twist. There is no brand on the thing but it is in their catalog. I did a hundred Federal paper hulls in less than 1/2 hour and the roll d=crimps came out perfect.