Hey, Moe, Here is picture of a gas check design they are press on when sized in a luber.
[attach #1]
The copper installed.
What's cool about this bullet is no grease rings, having said that. The only two lead bullets that I know of that are built like this. Paper patched bullets.
2ND page.
They are still shooting them today, how ever they are rifle bullets. But there is no hollow bottom right?
That leaves only one other bullet, or actually 3 of the same kind. That is the Starr.
Starr .44 cal pistol .464 dia 200 g
Starr .36 cal pistol .388 dia 120 grs

Starr .54 cal carbine .560 dia 360 grs
Sorry don't have a down load for it.
Thanks for you time. Arid