If they are brass as they appear to be, brass work hardened and becomes brittle, or little bombs. Naval brass, or bronze is probably good to go but I would pass.
Robin
316SS
I have never heard that Manris. I will have to look into it, this thing has fired off many pounds of black powder for decades, much to the delight of friends and family. I used to mix in Titanium chips for night firing and it would light up half a square mile!
Robin