Lyman Patent Breech?

[George T.]

Has anyone here seen one of these unscrewed from the barrel. I have been trying to get a method down for cleaning the chamber area. From what I can tell it appears to be pretty shallow like 3/4 of an inch. The angle is steeper than I would expect.

I wonder if it could be squared up withour weakening it to where it would be unsafe. I'm just thinking again! I have had no problem with rust so far. Geo. T.

 

[bob308]

i have shot a gpr for over 20 years and guess what i have never put any thing in the breach to clean it. all i ever do is remove the barrel stick the end in a can or bcket of hot soapy water. dish soap works just fine. pump a patch up and down till the water is black the use clear hot water till it stay clean. takes about two cans. then tqo dry patches. then a patch soaked with wd-40. come back the next day and some light oil.

i have never had a fouled or rusty breach. there is no need at all to go digging around in the breach.

 

[George T.]

Yeah! After three years the manual got me! Geo. T.

 

[Birddog6]

You can clean it with a proper shaped scraper or a small cleaning brush. This is what it looks like inside. I shot 3 of them for years & never had an issue cleaning them & never had a problem with them. After cleaning, I would spray some rust inhibitor in the bore, put a tight soaked patch on a jag & swab the bore & this forces the oil into the patent breech & out the vent hole.

Keith Lisle

 

[zimmerstutzen]

If it aint broke..........

 

[ohio ramrod]

After cleaning with warm to hot water I just put an alcohol soaked rag on wire tip ( make from an old bore brush ) and just put it down into the breech and give it a few turns.Then repeat with a LIGHTLY oiled rag after allowing a minute for the alcohol to evaporae.It works for me! :idunno:

 

[BrownBear]

I clean and oil along the lines of Keith, but as a final step I put a 30-35 cal brush back on the rod, drape an oiled patch over it, and shove that down into the breech. The bristles on the brush grab the patch and keep it there.

I also dab a little oil on a pipe cleaner and hit the flame channel with that. Never a single issue.

 

[George T.]

So that's what it looks like. I was hoping thar someone has pictures. The loads marked are informative for sure. Can't thank you enough. I be edumacated now! :applause: Geo. T.

 

[ebiggs1]

If you remove the nipple or touch hole liner whichever you have and hydraulicly pump warm water through the barrel, you will clean the “patent” breech area just fine. Get a bore light and check just to be sure, repeat if necessary. Dry and oil. :thumbsup:

 

[Zonie]

For what it's worth, with a flintlock and its relatively large touch hole I find no need to remove the vent liner when I'm doing my "pumping" with the breech in a bucket of water.

With a percussion gun and its very small hole (.028) thru the nipple I find that removing the nipple before immersing the breech in a bucket of water greatly improves the pumping action.
It also allows me to thoroughly clean the nipple and its threads.

In both cases using some power in the down stroke of the cleaning rod blows the water thru the breech area of the barrel with such violence that all traces of fouling and unburned powder are blown away.

 

[Greenjoytj]

I clean my GPR patent breach area with a 36 cal bronze brush.
I made a cleaning rod tool out of a long 1/2" pice of hardwood dowel that I whittled down the diameter to fit into the breach,then a fine jewellers saw was used to cut a slot in the end of the dowel so a patch could be wedged into the slot.

I wedge a patch in the slot with equal amount sticking out from either side of the dowel plus about 1/4" left hanging out the top.

With the GPR's vent plug out I can see this home made tool bottom out in the patent breach. A few turns of the dowel cleans the breach. I use the same tool to send an oily patch into the breach area.