Are you talking about a smokeless powder MZ or a black powder/black powder substitute MZ?

If black powder/substitute gun then you can't get the velocity high enough (safely) for bullet expansion, so bullet weight is what can be used to make up the energy equation, and large diameter bullets. NO smokeless powder can safely be used in a black powder/substitute gun. The steel cannot safely take the pressure.


Faith and love of others knows no mileage nor bounds. That's simply the way it is.
dogzapper

After the game is over, the king and the pawn go into the same box.
Italian Proverb