I've been wanting to try that one too. I have shot the Lee 500 grain flat nose out of my italian Sharps and have done alright. It has the same pitch to the riflings as the Handi, 1:20. Yesterday I shot some groups that went 1-3/4 and 1-7/8" at 100 yards with the flat nose. It's a gas check bullet but I've been shooting it without and loading with black powder.