I'll jump in here just because I don't know the answer and I don't think anyone else does. I understand the Stellas and I know the Alaskan Ambers. Decades ago, in a shop, was displayed a HG with the top strap and half the cylinder blown off. I asked about it and the proprietor ( no reason to think he knew what he was talking about ) stated that the owner had tried to reload the .357 mag cartridge using 22lr powder. Reportedly the 22lr powder is so fast burning, faster than any powder obtainable, it pressure spiked and exploded the HG. I would use more than extreme caution if trying to use reclaimed 22lr powder. Good luck.

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