[quote=@Prince of Seraphs]
What could possibly be the combat advantage to doing that. Just get a gun with an easier reload than a six shooter.
[/quote]

What's the combat advantage of having a weapon that weighs about the same of a fully grown adult man and possible costs at least 12000+ to fire for more then a minute? Almost none except for very situational purposes, and that's what the technique and his semblance for. It's not specialized for anything, allowing it to be useful for situations he's completely unprepared for, like reloading his gun as he falls through the air. or something.