Any ammo over 50 caliber, does that include round ball for my .80 caliber flintlock musket?
must be...I read it to mean it INCLUDED .50 caliber also:
“(dd) (1) It shall be unlawful for any person to possess ammunition that is 0.50 caliber or greater."
and then...
"(11) (A) Whoever knowingly violates section 922(dd)(1) shall be fined not less than $50,000 and not more than $100,000, imprisoned not less than 10 years and not more than 20 years, or both."
So, that's a minimum $50,000 fine and minimum 10 year sentence for every shooter marble your children have in the house when they knock on the door...
Not to mention a .54 caliber round ball, or .80...