Here are the answers based on my experiences and opinions:

do my guns need one turn to unjam before I can get another shot in? YES
Slight addendum to that answer. Every turn that you move straight gives you a 50% chance of unjamming. So it may take several turns to unjam if you are lucky. If you can fly straight with the left turn at the end. It may still give you tail position and unjam at the same time.