and in nearly all instances, they were either not following proper procedures or were bubba's with homemade pipe bombs (that they called cannons)BP cannons are nothing tp play with unless you know what you are doing. more than a few civil war re-enactors have been killed by exploding cannons over the years.
Pistol Range???? not much of a cannon.(Just joking) Try a 3" ordinace rifle, 600 yards , 3' zink round, 1 lb of powder - it's quite a thrill to see a 2,000 lb artillery piece recoil 6-8' and hear the sound of the round going downrange and seeing it hit the target 1-2 seconds after firing...At the range I'm a member of, there are some old timers out there on the 50 yard pistol range with some BP cannons. Man, those things are COOL! I was watching this one guy shoot his, and wow, that thing was accurate!!!! He had 10 shots on target with 4 in the bull at 50 yards... He's been building and shooting small cannons professionally and recreationally for years though, so he knows what' hes doing for sure.