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Hawken L&R Hooked Breech question.

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cannonball1

62 Cal.
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I am making a 58 caliber flintlock. I have purchased a hooked flintlock L&R breech. There is a 3/8" vent hole cavity. When the breech is in place this leaves a ledge from cavity to the .58 inside of the barrel. My question is do most leave the ledge or taper the barrel side of the breech so the powder flows to the bottom? Does it matter?
 
I doubt that it matters since the 3/8" hole will be full of powder. I used a L&R patent breech on my last build. They had drilled a hole from the left side to provide a flash channel to the nipple and plugged the hole with a screw that was dressed off flushed. When I test fired the rifle and then cleaned it I noticed bubbles coming out of that hole. In other words, it was leaking and would have probably led to problems. I ended up soldering a piece of rod to the screw so I could back it out and then soldered in a new screw to completely seal the hole. It's a good thing I hadn't browned the barrel before I test fired it or I would have been really PO'd. It's something you should look for on your hooked breech.
 
xxx


Which of these two drawings or does it matter.
Breech taper.jpeg
 
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