[J.B. Books]

It seems we are still dealing with a powder shortage and Alliant Red Dot and Promo are not available at this time unless you find a stash at your local gun store. I have a couple pounds of Clay Dot but I haven't tried it yet.

Looking at the Alliant Data here are my thoughts. 12 gauge Federal Gold Medal hull (similar straight wall hull design as Federal 10 ga hull). Recipes using Federal 209A primer (hottest available primer creating higher pressures over other primers). Powder weight varies from 17.1 grain to 19 grains, pressures range from 7590 to 9540.

The burn rate for Clay Dot is between Red Dot and Green Dot and we know those powders work well in the Short 10.

We also know the larger the bore the lower the pressure. So with that said I would be comfortable trying Clay Dot in a Federal hull with 209A or a Winchester 209 primer starting with 19 grains and 1 1/8 ounce and see how it sounds, recoils and breaks targets. If it felt weak I would go up a grain and try again. Since it is a slower powder than Red Dot my best guess is 20 to 21 grains will be the sweet spot for a Short 10 shooting 1 1/8 oz of lead. That however is just a guess. I would be comfortable trying it FWIW.

This is not a pressure tested load so you assume the risk but I am basing it on looking at 12ga data and using my head. Many us shooting short 10's have had to take a little risk like this in the past. If you try it and the loading feels "normal" you can always send out for pressure testing and if you do please report the results and I will include it in the 10ga reloading spread sheet.

Good luck.