No I've only ever shot round ball in this gun. I found that I had to buy .433 cal balls to get them to fit. I had originally bought .44 to go with my .01 patches.. but they were too tight, so maybe it isn't a true .45 cal, I dunno.
Then I found trouble with a weak firing pin spring that wouldn't set off the caps reliably. I fixed that best I could by taking apart receiver, cleaning things up and trying to stretch the spring gently. She fires but I don't trust it for hunting really, especially as I need something scoped for my eyes it would seem. ... I also stripped and refinished the wood in pine tar, so at least she's nice looking!