Which blackpowder type is used in larger bore muskets?

The choice of Fg blackpowder for larger bore muskets is appropriate because Fg powder is coarser than the other types. This coarseness is advantageous for larger bore firearms, as it allows for a more efficient burn and better performance with the larger volume of space that needs to be filled. The greater grain size helps in achieving a larger initial gas volume, which is necessary for propelling heavier projectiles typically used in muskets.

In contrast, the finer powders, such as FFFg and FFFFg, are more suited for smaller caliber firearms or firearms requiring faster ignition. They are designed for use in pistols and rifles where quick combustion and high pressures are desired. Utilizing these finer powders in larger bore muskets could lead to issues, such as incomplete combustion or excessive chamber pressure, which could be detrimental to the firearm and the shooter's safety. Therefore, Fg is the most suitable blackpowder type for larger bore muskets.