I have a box of mag tech 12 ga brass, Some Winchester paper Hulls that I will roll crimp to 2-5/8". I have plenty of 12 paper hulls of straight wall design. The ten is more interesting. I have quite a few paper 2-7/8" plus some in plastic also. I own a early Savage 10 ga chambered for the 3-1/2" shell so all the Winchester paper I have in that length I refuse to cut down for the lever, but I am going to attempt to locate a source or a supply of ten gauge paper in the 2-7/8" length. I'm looking forward to working with these two pieces of Old West Americana history.