This isn't a personal experience. It's an "I know a guy, who knows a guy, who does this." Nah. Not really. It's about my shooting partner. He drug me kicking and screaming into his Plainsman side matches. Where was I going, ...... Oh yea, Light Bullets in a 45-70
My partner has Balls. Really big .. Balls. Yep. Shoots Round Balls out of his 45-70. For Plainsman, down-loaded with about a half case of filler. Shoots like a laser. Recoil is didley squat. Really fun. Big 'ol 45-70 round, load it in a Handi rifle ..... BOOMBA ...... no recoil. FUN!!
Coffinmaker
PS: I could sure get interested in that "Collar Button" bullet as a real neat light pistol bullet for BP. Carry lotta lube. Or .. none with APP.