Coned Muzzles

[Flintlock Whiskey]

View attachment 361739
So here's your average garage sale hose nozzle.
The slope on the sides calculate out as 3.076 degrees to make a total cone angle of a little over six degrees. If the rifling grooves are 20/1000ths deep then to grind them out to the point of disappearing at the muzzle will leave a depth of grinding (axially down the bore) of about 3/8". If it went 50/1000ths instead of 20/1000ths then the depth would be less than an inch. Dang if I can't see why it wouldn't work.

Any idea who made this?

 

[nkbj]

Nkbj, the only issue I see, is how to keep it centered in the bore.
Joe Woods tools have a fitted jag specific to caliber.

That existing flange on the outlet end is .53" diameter. I reckon for use on smaller diameters it would probably be easiest to replace it with a threaded hole for jags.

 

[nkbj]

Any idea who made this?

It's stamped with "China".