roundball said:
Not yet and passed the 12,000 shot mark within the past year.
One summer 2-3 years ago, I intentionally set about trying to get an accidental discharge at the range...I was alone and made certain never to have my head or a whole hand over the muzzle at any time.
I shot and reloaded 50 shots of 50grns Goex 3F at the range as fast as I possibly could...didn't wipe between shots...was pouring the next premeasured charge so fast the powder drop forced smoke out of the vent...barrel got so hot I couldn't wrap my hand around it.
Never had the first problem...not saying I never could, but I sure never have and at least that summer couldn't even force one...others mileage may vary
Pushing ones luck in this manner is not recommended.
There is one periodically in MUzzle Blasts, first one I read about was at Freindship, pistol match, guy took a ball and rod through the wrist.
Culprit was fouling build up in the breech, maintained a spark,
fired as ball was seated.
All the others are from the same basic cause as I recall.
Thus I avoid shooting long strings without cleaning.
Also different guns with different breech designs are more or less prone to this I suspect. But the pistol mentioned, IIRC, was a plain breech flint.
Someone had it happen with the shotgun on the trap range, there are others.
Not being able to produce this accident on a given day with a given gun and a given powder is no proof it might not happen tomorrow with the change of one or more variables.
Heat in the barrel is not the concern. The charge is not going to cook off (like a hot 50 BMG will do) until the temp is very high and likely the wood starts to smoke.
Its the hidden hot spot in powder fouling. The air flow, from being forced out through the vent may cause it to glow??
Dan