Maven said:
Coincidentally, I just finished testing a 20ga. Green River Forge trade gun which was prone to hang fires. I'm pretty sure I've solved its problem, but here's what I did/do to get it to fire almost instantaneously:
***SNIP***
3) Prime with FFFFg, no more than half a pan full, banked against the touch hole*
***SNIP***
*Larry Pletcher (Pletch) has tested the powder away from the touch hole v. powder banked against it. You may want to look at his findings.
Pletch has a number of high speed studies that he's done on locks including filling the pan full, filling it half full, banking it away from the touch hole, and banking it against a touch hole.
It's very methodical and very well done, however it never ignites any of the powder by showering sparks on top. For consistency sake he uses a heated rod to ignite the powder. I think it was a mistake to do so. I understand his attempt to minimize variables in the tests, but he ended up using a method that nobody uses in the field and came up with some results that really surprised me because they were so counter to my personal experience.
Personally I have two .50 caliber longrifles. One is a Traditions Pennsylvania Longrifle that has a very small lock. The other is an Early Lancaster gun that was built by tg when he was a member of the forum. The build by tg was/is excellent and he used an L&R Queen Anne lock which was perfect for the time period. The Queen Anne is a much larger lock with a much larger pan. I use 3Fg powder as both the prime and the main charge in both. If you don't already have 4F powder, there's really no need to go buy any because 2F and 3F work fine. You can if you like but although the speed difference between them can be scientifically measured (Pletch has some info on this too), it is so small as to be indiscernible to the human eye. Still there's lots of folks who like to use it, so suit yourself.
My two rifles have vastly different preferences in priming:
The Traditions works best when the pan is no more than half full and banked AWAY from the touch hole. If you bank it over the touch hole you will get that fuse effect every time. If you bank it away from the touch hole (close the pan and give your wrist a quick flip to the outside of the rifle) it is almost instantaneous. It is at least as instantaneous as I can detect.
The Early Lancaster with the Queen Anne lock is not real picky about the prime. It fires fastest with half a pan full but it doesn't seem to matter if it is banked away from the touch hole, towards it, or if it is filled all the way up with powder. It will still go off quite nicely. I believe it fires best with half a pan and I try to put that amount in it. I do participate in reenactments and sometimes when it is more important to get a lot of shots, I can pour more powder in the pan than I intend to. This lock just eats it up and keeps on going.
I firmly believe that the reason my experience is opposite of Pletch's is because my ignition is being caused by sparks cascading from my flint onto the top of the powder (that's all that is exposed to the sparks) and not by pushing a red-hot rod to the bottom of the pan. So, I'm saying, try some of these out. You don't have to live fire round balls to work on pan/load ignitions. Just roll some blanks cartridges shoot some blanks. You'll be able to figure out fairly quickly what your gun likes.
Here's a test you can run that will show you just how little powder is needed to fire your rifle. Lick your finger and wipe the bottom and edge of your pan with it. Put in enough powder to cover the dampened area. Now turn the pan upside down and dump out all the powder leaving just the amount that clings to the dampened area you rubbed your wet finger on. Now close the frizzen and fire your rifle. You will be surprised to see just how little powder it takes to do the trick. I did that four separate times with my Traditions rifle when I first got it and every time it fired instantaneously without a single flash in the pan. And yes, I have been accused of being a "thrifty Scot!"
Twisted_1in66 :thumbsup:
Dan