Make a ML barrel ??

[Dagalee]

I'd like to make a 20ga shotgun barrel into a 20ga ML.
I'm sure it's been done but haven't seen any info on it.
I would think that blackpowder pressure ( normal loads )
would not be a problem.
Starting from scratch , what type primer should I build
it to handle ? 209, #11 , large rifle , musket ?
I would think 209 the right choice.
I have a 20ga barrel I was going to use as a stub project.
Outside looks OK. Bore looks great. But chamber is pitted.
And it was too tight to fit unaltered on my SB2 frame.
Factory 12ga ML barrels seem scarce.
I'd have to make the threaded plug long enough to reach
the forcing cone and drill maybe a 3/8" or 1/2" hole
from the main charge to the nipple to keep the shot or
patched ball from getting hung up behind the forcing cone.
Any suggestions or first hand experience would be
greatly appreciated.
Thanks
Dagalee

[quickdtoo]

An alternative, not a true ML legally tho, but would work in a pinch. 

Tim

http://www.youtube.com/watch?v=ES59LtA7XE8&feature=youtube_gdata_playe

[Dagalee]

I wanted to do a permanent installation not a slip in
insert.
Drill and tap the chamber and make a threaded insert.
I don't NEED one , just want one.
The barrel I've got would only be good as a stub otherwise
since the chamber is badly pitted. But having a bright
bore I really hate to hack it off and throw it away just for
the stub.
Besides I've run out of anything to piddle with.
Dagalee

[PHATINJUN]

Not really a lot to it if you got enough meat to thread for breech plug . Thread it ,make a breech plug load it shoot it. i would use a 209 nipple. Kurt

[srussell]

Not really a lot to it if you got enough meat to thread for breech plug . Thread it ,make a breech plug load it shoot it. i would use a 209 nipple. Kurt

   this is true. get a smith are do it your self. tread the breach drill a hole for 209 primers. put a slot in the breach plug so it can be screwed in and out. you will most likely have to make a long plug to fill the chamber. so counter sink it  so you can get the powder closer to the primer. i have a 12 gage like that.

[scratchmark]

ive got a 10ga barrel i wanna do the same thing to.