475 Linebaugh with 45 ACP projectiles
I am sorry I don't have any better photos. I used to have a lot of them but ...
The ACP case is loaded base first into the cartridge, with the fired primer still seated. I shot them the other way around and the pressure blew the primer out and left the ACP cartridge stuck in the middle of the barrel.
Someone else had a similar issue I hear ... ahahaha
These were only running about 1600- 1700 fps. Others who tried this got them up over 2000 fps.
These have enough power to take down the 25 yard chickens.
When I spent some time with Lee Jurras about 10 years ago we shot quite a few of these.