|I was testing my new semi-auto shotgun and I loaded a spent shell and a snap cap in the Magazine. The ammo fed but the shell didn't eject which is a double feed.
The bolt was stuck and I couldn't open it. Luckily there were no bullets in the gun and only snap caps.
I removed the magazine cover and spring and then used some small tools to guide the snap cap into the magazine. After removing the spring the snap cap came out.
I got the action to open by banging the butt onto the floor. This could have caused an accidental discharge.
This is definitely something to practice.