Make no mistake, BH209 is dirty, when compared with smokeless. The fouling left behind is such a small layer though, it doesn’t really have an effect on accuracy or loading pressure. I shot probably 200 shots through my CVA Accura before I cleaned the breech plug out with a drill bit. It had closed down significantly. I think I stepped through about 5 or 6 numbered bits till I got it clean. I also believe it’s primer fouling building in the flame channel, not powder fouling. Ihave only had one fail to fire using BH209 though, and pretty sure it was my fault, not the primer or powders. I wrapped my plug with Teflon Tape and think I plugged the flash hole when I loaded up. 2nd primer set it off and the next 12 as well went off. The FTF was in an original Optima with a regular breech plug.(flat face) and not sure it wasn’t the primers fault, just don’t ever want to blame an inanimate object...
I am totally new to BH209 powder, and the shooting of inlines. With my pistol away in Utah having custom work done on it I have yet to actually shoot an inline.
So what I am about to say pertains to muzzloaders in general, and to real black powder shooting firearms in particular. Flintlocks and percussion sidelocks. But, could just as easily apply to a hande cannone set off with a taper. Or, a matchlock, wheelock, snaphaunce, or miquelet. OR A MODERN INLINE.
Too many people approach the modern inline muzzleloader as if it was EXACTLY LIKE a modern, 21st Century, brass cartridge, centerfire weapon.
It is not!!!! It is dirty and it is finicky by comparison to a centerfire cartridge rifle. PERIOD!!!!!
Several months of reading posts here at MM, asking questions, and actively involving myself in the forum has CONVINCED ME that there are going to be certain preventative measures that if taken before EVERY SHOT WILL VIRTUALLY ELIMINATE THE POSSIBILITY OF A MISFIRE.........
These procedures are for my Optima V2 pistol with a Lehigh Defense #BP-BP-C1, BH209, CVA, QRBP breech plug.......
1. Run a brass, wire rod, pick through the flash channel of the #VL-1 vent liner after the shot has been taken to make sure the hole is unobstructed.
2. Gently run a 3.1mm drill bit (0.122" diameter) in the flame channel of the plug body to scrape out any carbon from the 209 primer explosion. If done EVERY SHOT, instead of when the build up becomes a problem; then the shank end, non-cutting end of the drill bit should be able to be utilized. This should drastically reduce the possibility of enlarging the flame channel unnecessarily. Allowing for the fluted cutting end of the drill bit to only have to be utilized perhaps every 10-20 shots? Maybe every 20-50 shots? Experimentation will determine the ratio.
3. Use the same brass, wire rod, pick to gently probe into the packed BH209 powder charge through the flash channel of the vent liner, before priming the breech plug with the 209 primer. This is to ENSURE THAT THERE IS AN UNOBSTRUCTED PASSAGE BETWEEN THE 209 PRIMER'S JET OF FLAME AND THE BH209 POWDER CHARGE.
These procedures are NOT.MUCH DIFFERENT than what I instituted, and religiously followed, when I shot my flintlocks. After adopting the set of procedures, I almost never had a MISFIRE. Unless I was distracted by somebody talking to me.