I managed to get two pounds of Winchester AA Super-Target AA WST1, which is labeled as being good for target and standard velocity shotshell loads. But I don't load for shotgun, only pistol. 9mm, .45 ACP, .357 Magnum, .44 Magnum, .45 Colt, .454 Casull and .500 Smith & Wesson.

Is there any source for loading data using this powder in metallic cartridges like there is for other shotgun powders?

Thanks in advance. I bought these when powder was super scarce, but never was able to find data with which to use it. I have occasionally seen references to "AA", and "WST", but have no confidence that these are referring to this particular powder and am not willing to take the risk of a mistake.

Lost Sheep

Call Hodgdon and ask their tech. Hodgdon is the distributor for Winchester powders publish data for them. If anyone can point you to an answer they should be able to.