[Lost Sheep]

Here are some thoughts, at least until someone knowledgeable shows up.

Take a look at the primers' flash holes. If a single hole and about the same size as regular brass or if double holes (Berdan-primed, harder to reload). If the flash hole is over-large, it might not be a good idea for anything but wax bullets.

I have no idea if the brass is the same hardness/strength as regular brass. You might want to try loading one lightly with a fast powder (pistol powder or powder used for fire-forming) to see, then work up to regular rifle powders carefully.

Or put an ad up to trade for actual ammunition or brass you know is meant for reloading.

How experimental do you feel? Wear a full face shield when you shoot these. Powder blow-back leaves pock-marks in skin.

Lost Sheep