[Mike Weber]

I'd suggest a roll crimp for round ball loads, these also make a pretty good crimp for shot when combined with overshot cards. The lifespan of the roll crimped hulls seems to be shortened when compared to a star crimp. Nothing wrong with round ball loads if they are loaded to within reasonable pressures. What type of loading press are you working with?

 

[Mike Weber]

I have to agree with Coal on this! If you're trying to substitute shot loads for solids or round ball using the same powder charges you are playing a very dangerous game. Reloading requires following specific and safe recipes from manuals and use of proper equipment. Load development must be worked up very carefully. Round ball and slug loads are possible but they require specific equipment to produce safe and accurate loads and most importantly get a manual for shotshell reloading and follow the instructions.

 

[Mike Weber]

Gotta admit it is a great setup for reloading the old paper hulls!