I actually had this happen to me during a match with my 930. It sucked but I did get it out on the clock.
Local match
What I did was pull the bolt back with my left hand and dump the gun over to drop the second round.
What I did next i had no idea if it was legal or not but i did it anyways.
While still holding the bolt back I partially kneeled and put the but of the gun in my hip.
Next out came the trust assisted auto pocket knife.
Used it as a make shit extractor, Ripped the other round out dumped it and dropped both the knife and the shell on the ground.
Pointed at the knife in warning when I dropped it, Shouldered the Shotgun and kept right on going.
Didnt end up with a penalty or anything at the match.
Everyone was like wth firtst time iv seen it done like that on the clock.