Flintlock pan polishing.

I ground up some 3F. It wasn't any faster than 3F. It probably wasn't as fine as Null B but it was a lot finer than 3F.
I think that when you get down to 3fg and 4fg, our senses aren't going to tell the difference. 4fg vs. 2fg...maybe. Possibly. And, ignition time can vary from shot to shot, from clean to dirty gun, etc., regardless. I think I can tell the difference between 4fg and 1fg, because that's a bigger spread.
 
I used to prime my rocklocks with 4 f until I read about how the Brits used to load the Brown Bess. Bite off the end of a paper caftridge, prime the pan, close the frizzen and dump the powder from the cartridge down the barrel followed by the ball and remains of the cartridge. Point it at the opposite guy and pull the trigger. I noticed a faster go bang time with the 3 f as opposed to the 4 f. Now the 4 f is reserved for pistol cartridges and revolvers.
I have gone to 4fg for all my revolvers, so if I have a revolver on me, I also have a flask of 4fg, so that's just a handy way to prime. And the only reason to prime with 4fg. But with both rifle and musket I always carry paper cartridges for things like chasing wounded bears around in the brush, (been there done that) and in that case I'm going to prime from the cartridge, British style.
 
Every once in a while, I will see a reddish-brown "klinker" in the touch hole, which I assume is poorly-burned powder or some related kind of trash. If I try to shoot the gun in that condition, it often won't work. So when I see it, I dig it out or shift it around so that fresh powder appears, and that always allows the gun to go off. I suspect those little klinkers are responsible for at least some of the flintlock's reputation for unreliability.

Tl;dr: I think big touch holes are a very good idea. :)
Yes, the red klinkers. From what I understand, those result due to specific temps, humidity, and phase of the moon or something. Yep I've seen those in the bore on rare occasions, and certainly one could fall back down into the breech when re-loading, and clog the vent. But again, with coarse powder it would be apparent by looking closely at the vent.

They could indeed fuel the myth of flintlock unreliability, although I think it is unreliable cleaning and loading practices that are fully responsible for that. Plus all the guns that have been on the market for decades with poorly designed unreliable locks.

On touch holes/vents, I think there is a sweet spot as far as size, but I don't really know what it is. .070" might be it, but I do have the White Lightning vent on my Jeager, which Hawg says is .050", but I've never measured mine. I think I drilled my musket vent to around .060-.070", but I don't remember. !!!! Heck, I don't remember why I came into the man-cave, but dang, the computer said: "tune me on"!
 
I'm another fan of Null B - as long as it is dry, it will go off if you look at it funny - and it can turn an iffy lock into a very reliable one. I have no doubt it results in the fastest ignition as well - but as others have noted, my senses aren't sharp enough to tell, so I'm not sure if it matters in the real world.

On the whole, though, i'm enjoying flintlocks more as I cut down on the amount of crap I carry in the field, so am happy to carry a gun with a quality lock and leave the priming flasks/horns/whatever at home.
 
FYI, testing by Larry Pletch proves Null B is the fastest priming powdah … just not sure if any but the best offhand shooters can realize any benefit.

I’d go so for as to say that if Null B improved the reliability of a flintlock … that lock/rifle had more issues than just the priming powdah choice!

The link below is to an article in which Larry timed Swiss Null B (the quickest) to Goex ffg (the slowest) in this test:

 
but as others have noted, my senses aren't sharp enough to tell, so I'm not sure if it matters in the real world.
No, as long as one has good follow-through, it doesn't matter. Fast ignition is "nice", and something to strive for, but those last three micro seconds won't make or break the shot. (other than super-competitive target shooting I suppose) (or if one is a flincher) Reliability is more importanter. :) Follow through is everything.
 
Well now this is interesting. I have a piece of one of the barrel pins for my Woodsrunner. I was thinking of making a vent pick out of it. It fits with a little slop but not a lot. If my calipers can be believed it's .060 so it's bigger than that. The pins are supposed to be 1/16 which would be .065 but I'm pretty sure it has more slop than that. Maybe .070. Jim must drill the liners when he installs them.🤔
 
I’d go so for as to say that if Null B improved the reliability of a flintlock … that lock/rifle had more issues than just the priming powdah choice!
I agree completely. That's why I no longer bother with it on things like Kiblers. But for guns which I've "fixed" as much as I can but are still imperfect, Null B is the difference between a toy and a tool.
 
Is Null B a powdered black powder, or is it's chemical make up different?
Rumor has it that it is the leftover "fines" from production. At any rate, it is extremely fine - almost dusty - untreated powder. No difference, chemically, from the regular stuff, but no graphite or other burn deterents/regulators, so it burns easily and quickly. The only real downside is that it sucks up humidity like no one's business, and on a rainy day can turn into black mud that won't burn in a furnace.
 
Dang. Sounds like one could grind up regular powder with a spoon and saucer, and get almost the same results. ?? I kind of get the impression that it's a solution to a symptom, and not whatever is the real problem. ?
 
Agreed Ugly, so many little things can pile up to make a rocklock not go bang. Undersized touch hole or wrong location plus maybe poor lock geometry all can add up to phhhtt instead of bang or worse yet just a loud click.
 
FWIW here's a test of the FASTEST priming powdahs by Larry Pletcher.
 

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@Ugly Sauce I do suspect it is partly a solution to a modern problem, i.e. less-than-perfect Italian and Indian locks. And, probably, something the competition shooters appreciate. And, probably, a bit of extra income/advertising from the powder folks, who otherwise would have been dumping their waste into the pond.

For my money, the competition/gaming folks have a slight negative effect on the hobby, in that they are discovering (or possibly rediscovering) tricks that gain them an extra few points. That's fine, except that a certain type will then go online to tell you that if you aren't using Null B, or wiping after every shot, or hammering a massively oversized ball down the bore, then you're doing it wrong.

And here I am up on my soapbox again. :D
 
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