Mr.Caliber, I'm probably the only person seen shooting traditional percussion guns at my gun club.
DaveP (UK), thanks for the response.
You really should try sabots someday. The convenient thing about them is that the .50 caliber ones are designed to fit either .44 magnum bullets (.429 -.430 diameter) or .45-70 type bullets (.450 - .452). So you can easily shoot and try out whatever different bullets you can find using the sabot components that can be bought in bulk.
There also are easier loading plastic skirted ML bullets (the plastic bases just snap onto the bullet base) and sabots of slightly different designs. They can have more or less plastic petals, be made of slightly different materials and have different dimensions and/or features.
The most popular bullets for .50 sabots probably weigh about 240 - 250 grains. The lighter bullets produce less recoil and generally shoot flatter, and each style can have a different trajectory and accuracy potential. When the bullets are smaller .44 -.45 diameter, they have better ballistics and stability than most of the .50 lead bullets shot out of the fast twist inlines, especially those with shallow rifling.
You shouldn't worry too much about the plastic litter, it can sometimes be found right below the target frame. When the bullet passes through a cardboard backed target, some of the one piece sabots will release from the bullet and simply drop to the ground there. Others that release closer to where they exit the barrel are easier to spot and pickup than plastic shotshell components because they're usually more colorful.
But I do enjoy loading and shooting patched round balls the most.