Years ago (I was about 20 or so...) when I was casting bullets, I would occasionally toss a Speer .45 200 gr. JHP 'Flying Ashtray' into the lead furnace, and of course, it's core would immediately melt out, and the jacket float to the surface.

The 'hole' at the front of the jacket was EXACTLY the right size to hold a 209 shotshell primer.
In order to return some lead to the jacket's interior, I would tightly pack it with #12 shot, and leave just enough room to epoxy a 209 primer in place in the front of the bullet.

Would load them in .45 ACP and .45 Colt cases. They were fun to play with and did wondrous things to blocks of wood, clay creekbanks, and water-filled milk jugs.

Sometimes, instead of filling the jacket with the #12 shot, I'd fill it with black powder ground to a flour-like consistency, and then top with the 209 primer. Those were fun, and made a really nice 'flash/pop' on impact with anything.

Yes, I was a strange child.

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Ret'd LEO
SWCA #2275