What utter tosh from the so called voice of shooting.
Can you name a muzzleloader with a barrel less than 6.17mm?
Let me answer for you, no, you bloody can't.
Yet again from the voice of no experience with muzzleloading shotguns he or they believe an alternative will work.
It doesn't.
For a start off most muzzleloader shotguns only generate around a 1000fps. Most have no choke. They are short range guns using shot and depends vastly on the weight of the shot per pellet.
You CAN NOT push shot from a muzzleloader quicker without ruining patterns due to the nature of the gasses produced.
Yet again a " I wash my hands in the matter approach".
I hope you have many a good day with your posh chums talking utter tosh amongst yourselves.
It's true what my old gamekeeper said about septic tanks....