Have broken down all the rounds that failed to fire in my rifles over the years. Found the powder missing in two that I can recall. Otherwise the primer did not go off, and all were retried before breaking them down. Some went off on the second try, and one on the third try. If they didn't fire in 3 tries, I gave up.
Have only had one FTF due to a lack of powder push the bullet into the throat of the rifle. That would depend considerably on the size of the case, and how firmly the bullet was seated (and possibly crimped) into the neck.
