Let's wait and see what Hodgdon's has to say.
But, here's the thing about powder. People sometimes have a notion that any powder is good (in the right amount) for everything. That just isn't always true.
Clays, for example....... It was developed for shotshell loads, specifically for loading for "Sporting Clays", a specific shotgun game.
Here's the excerpt from Hodgdon's site:
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CLAYS™
Introduced in January, 1992, CLAYS gunpowder has "taken the clay target world by storm". It is the cleanest burning , most consistent 12 ga. 7/8., 1 oz. and 1 1/8 oz. powder available today, the preferred choice of competitive target shooters.. The superb burning characteristics of this powder produce soft, smooth recoil and excellent patterns. These features transfer directly to handgun applications where target shooting is the main goal. 45 ACP and 38 Special are only two of the cartridges where CLAYS gunpowder provides "tack driving" target accuracy with flawless functioning. Available in 14 oz., 4 lb. & 8 lb. containers.
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Yes, you can use it in some handgun loads (never a rifle load!), but carefully. Typically, the difference between a starting load and a max load is small. It's easy to get in trouble
Clays in a 45 ACP with a 230 grain FMJ FP bullet has a starting load of 3.7 grains, and a max of 4.0.
You have to do your powder measure setup carefully to assure that you never get over 4.0.
I like using powders that give you a broader range for a given bullet. Titegroup for that same 45ACP bullet is 4.4 to 4.8, just a little better than the Clays. 231 powder, however, has a wonderful range, 4.2 to 5.3 grains. It allows you to work up a load that will do what you want, without having to worry that your over pressuring the round.
So, I hope that Hodgdon can give the OP a set of reload data for what he is trying to do with the Clays. But powder is not always one size fits all.
