The 1oz load will work for a 10ga but most loads are heavier. On my old measure 1 1/2oz of shot has 3 3/4 drams on the other side. That would be 102 grains of powder by volume. The old standard 3 dram 12ga load of 1 1/8 oz has about 82grains of powder. There use to be a really old guy with a big handle bar mustache mwho attended my SxS Shoots and shot BP in a 10, really heavy charges. I never knew how much shot he used, but he sure liked to use powder. The ground would shake. When shooting the inclosed 5- stand the whole building shook. He'd laugh whether he hit the bird or not. Punch in " old reloading equipment" and I bet some web sites will come up.
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Paul Harm
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