cleaning in back of the flash hole liner

[M. De Land]

I spent another half day at the range Saturday getting acquainted with my flint pistol in .36 caliber.
It was a misty day with small rain drops floating down and the humidity very high. I did notice more failures to light the pan powder as the day wore on and the fouling accumulated. Good experience to learn how to make these guns work correctly in adverse match condition.
When I got home and started the clean up I noticed the threaded hole in the barrel wall for the flash hole liner leaves a 90 degree fouling trap as the liner does not fully fill it up to the barrel interior. What is the most effective way to clean this out? My liner is not removable however the breech plug is but still presents a problem of getting into the 90 degree counter bore as it effectively becomes, on the back side of the liner.
I don't like this feature much and was thinking perhaps it might be necessary to make a new one of stainless steel, index it,remove and mill a radius in the back to conform to the groove diameter profile. Any ideas? MD

 

[M. De Land]

Think I dreamed up a solution to day while thinking on the problem. I'll bend a .22 cal bronze brush to a 90 degree at the very tip. Remove the removable breech plug, screw the bent brush onto my brass pistol cleaning rod, wet it with Gunzilla, put up bore and move it around the circumference of the interior threaded hole. This should scrub the threads to the bottom of the back of the liner hole. Swab out and blow compressed air in the flash hole from the outside.
I notice the other day when I cleaned the bore out at the range that the back of the liner hole in the barrel wall was cutting bits of cleaning patch loose and they were coming out the flash hole when I picked it clean. Still sharp in there apparently.
I think if I were going to fit a liner I would make it the same width as the barrel wall and contour it to the OD of the groove diameter then cone it some on the back side at the flash hole. It wouldn't hook cleaning patches and be much easier to clean I would think. MD