Thread: Myth? - shorter barrel = use faster powder?

But a 'muzzle blast' according to Wikipedia is an explosive shockwave created at the muzzle of a firearm by gasses created by the burnt powder.

"In addition to the blast itself, some of the gases' energy is also released as light energy, known as a muzzle flash".

So all the powder must be burnt inside the muzzle. The muzzle blast/fireball is light from the gasses.... not burning powder.

https://en.wikipedia.org/wiki/Muzzle_blast