Just added safety info for you: If you have a partial ignition of powder (hiss and fizzle), don’t re-cap and fire. This doesn’t sound like what you experienced.
This happened to me when was first starting out and I used a patch that was a bit too wet to clean at the range between shots. The dampness affected the powder I loaded next, and when I fired I got a fizzle and it drove the bullet almost fully out of the bore (stopped a few inches short of the muzzle and I had to later pound it out with a brass rod). After removing the breech plug there was still a lot of un-burnt powder still in the barrel. It might have ignited with a second cap, if the first partial ignition dried out the wet powder. Probably not? Hopefully not?
After discovering the initial conditions on the range (bullet 3-4 inches from end of muzzle and lots of unburned powder), I thought about putting a small charge of 10-20 grains in from the back and trying to shoot it the rest of the way out by leaving it in the rest and pulling the trigger with some string. But as it was, I just quit the range, came back here to confer with the collective, and pounded it out (which was still a real bear).
Hope you can learn something from that,
Buster