You mean you didnt see that shinny copper cap on the nipple before you pulled the trigger?
or was this with a different gun?
Only time i ever dry fire my C&B guns i have a rag infront of the hammer. I think of these the same way as my rimfire NEVER dry fire
Well, since you asked...
My basic rule is to never take a loaded gun home from the range. If I am deer hunting with my muzzleloader and I haven't scored, I shoot it out, take it home, clean it, recharge the next morning before returning to the woods. Same for revolvers.
Except once when practicing at the range, a revolver jammed and I could not clear it at the range. I refuse to completely disassemble a revolver at a range to dig a cap out of the internals...too easy to lose the parts. So I took this revolver home with one chamber charged. I cleared the jam, wiped out the barrel and 5 empty chambers, and intended to write myself a note and tape it to the gun, reminding myself that it was charged. Something distracted me, never got around to writing the note, and I put it away as is.
Six months later, when I decided to take that revolver to the range again, I took it into the garage to charge the cylinders before driving to the range. Increases shooting time at the range don't you know. So I put caps on all 6 nipples to clear the chambers before loading. Pop, pop, pop, BANG.
No excuses, it was stupid. The only thing I did right was to follow the rule about never pointing a gun at anything you don't want to destroy. Not that I really wanted to destroy my workbench, but there were other things in the garage that would have been worse to shoot.
So, that's how it happened. In addition to never bringing a loaded gun home from the range, I have added the rule to always load at the range. The hole is a humbling reminder.