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3" shells in a 2 3/4" 870 chamber?

23K views 19 replies 9 participants last post by  RandyWakeman  
moosemike said:
Alright I'll try it. So the 3" receiver is not any more beefed up to handle 3" pressures?
The SAAMI max pressure for 2 3/4 inch and 3 inch 12 gauge is the same. 11,500 for both.