I have a Stoeger Condor Outback 20 gauge and I aquired a box of hevi13 3" #5 turkey shells.
1. Are they safe in my shotgun?
2. Whats the tightest choke I can safely use without bulging my barrel?
3. Does hevi-shot make 20 gauge chokes?
4. If not, can you recomend someone?

Please check with the Rifle MFG. That is the best option for the rifle as we currently don't have any specifics on that make. Also we recomend Carlson Choke Tubes for your application.