Charlie it took me some trial and error to learn that 19gr of Red Dot was a sweet spot for the Short Ten with 1 1/8 ounce. I also like 22gr of Green Dot with 1 1/8 ounce. Green Dot has a long history of use by trapshooters for lower felt recoil and tighter patterns for Handicap shooting. My Remington '94 10ga shot 92-93% using Green Dot. You should try that powder too and see if it tightens up your patterns a little.
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