1 time I had a squib load from one of my reloads, I didn't have a rod to push it out but kokohead did
One of my shooting buddies used to load his IPSC/USPSA match rounds pretty close to min, so it wasn't that uncommon for him to have a "poof" instead of "BANG". He usually carried a small hammer/mallet and a rod. Though with semi autos, relatively easy to take out the barrel and improvise. Chopsticks seems to be a common improvised tool.
Maybe a little different with revolvers as to ROs, looks much different working on a barrel out of a semi-auto as opposed to a revolver, even with the cylinder out. One time, when I was RSO at SRGC, a guy managed to load a .357 Mag in his .38 SPL revolver. He didn't fire it, but he managed to get the round into the firing position. But when it got there, he couldn't get the cylinder out or advance the cylinder. It seemed like the tip of the bullet head needed to be filed down. No idea how he got the round into that position in the first place. When my shift ended, he was still working on the revolver. No idea what ended up happening, but I always remembered that. I think a thin nail file would have done the trick, but it would have marred his cylinder and barrel throat.