I have never held an Auto&Burglar, but I have fired a sawed off like that one I talked about in my earlier post. I have fired #4's as well as #4 Buck and 00 Buck. Wow!! If you are ever faced with that choice, do yourself a favor and stick with the one with the least powder!!!! It just so happened that each of the loads I fired were stoked with essentially the same powder measure, i.e., both were high power shells. I have to tell you that the recoil from the first round was so unexpectedly violent that it the inside front of the trigger guard cut a nasty gash in my right hand trigger finger. Of course, being young (and, I suppose, reasonably stupid) at the time, I wrapped a band aid around it and went on to fire the remaining four rounds!! Youth!! Ain't it wonderful!!!!! I have fired nothing but blanks in the one I currently own, but if I decide to fire it I think I will use some very low pressure 2.5 inch 7.5's that I have for a Damascus that I shoot regularly!!!!