I solved the problem of not finding adequate data for short (2 9/16th inch) shells for my short cambered 16gauge guns by trimming 2 3/4 inch hulls to the short length and using a roll crimp. You can use the same load data published for 2 3/4 inch folded crimp shells because the interior volume is very close to the same between the folded crimp 2 3/4 inch hull and the 2 5/8th inch hull with a rolled crimp (which was the old standard for 12 gauge shells). Besides roll crimps either in paper (Federal) or plastic are so cool and using the the Federal paper you have the advantage of that great smell that cannot be duplicated by plastic shells. I use vintage roll crimp tools picked up on eBay cheap, in 12 gauge anyway which adds to the fun of loading. Circle Fly sells over shot cards and if you want to go completely retro they also sell fiber cushion and fiber nitro cards. The early Lyman reloading books have several nice low pressure 1 1/8th ounce loads in 12 gauge using SR 7625.
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