I believe the burps were with 1 oz, 2 3/4 dr field loads,Charmed. Lite buck should work well.
All of the semis are slightly ammo sensitive. That's one reason people should test and pattern to see what works for their particular weapon. While incompatibility probs are rare with modern ammo and name brand shotguns, they do happen.
For practice, a 1 1/8 oz 3 dr load should cycle in all semis. If not, one can get in some valuable practice on clearance drills(G)...