Charlie, your photos of the 10 gauge shell popped up at the bottom of my screen today. That is a very nice example of a 'commercial handload'. That may not be a correct term, but the '1901' hulls were only sold empty. Selby may have been a large sporting or hardware distributor. Drew Hause may have some info on the name. Yours is a load of 30 grains of Ballistite with 1-1/8 ounces of number 7 shot.
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