Great looking little rifle you have there. I kinda have a soft spot for short, handy rifles.
Years ago I had a "Zouave" and shot it a lot. I never killed a deer with it but did kill lots of small game using prb. One was a big fox squirrel that I hit in the neck. That big ball simply made a slit going in and another slit where it exited.
FWIW, I shot lots of minies as well as prb. I lubed them as usual but then took a small sheet of toilet paper (split a 2-ply and used only 1-ply) and wrapped the bullet with it. The lube, beeswax and Crisco, made the sheet stick very well. These minies still went down easily but didn't slide back out when held muzzle down.