Was setting up to repurpose target loads to buckshot and round balls. Bought the necessary supplies but was having a hard time swallowing the 30 bucks for drill run crimper. Was looking around for something to make up when I came on a bag of hardwood toy car wheels I bought at Lowe's a few years back for a kids project. The inner detail ring fit the hull perfectly. Simply added a 1/4" screw as a mandrel. Made a block to hold the hull, chucked it in the drill press and spun away. The results were good. I spun all the spent hulls I had with the same results. The wheel shows little to no wear. Don't know how long it will last but you get 4 wheels for less than 3 bucks. Just thought I would pass this along.