Any 12ga load of moderate pressure will work in the 10 with even less pressure. I've used 700X, American select, Promo, Red Dot, and Green Dot. Because the chamber of a 10 is bigger in diameter than a 12, the pressure is less. Years back when using 4756 in my 12 with low pressure loads in the winter I got bloopers. Have never used it again.
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Paul Harm
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