Well, my Remington 870 Wingmaster has a plug that only allows three in the tube...Take out the plug and I have room for five...
BOR is full of crap...
Yep...for duck hunting, I always put in the plug...as you had to. For pheasants, quail, grouse, rabbit...no plug and 5 total (one in chamber, and 4 more ready to go in after the pump). I’m sure BOR would not want to stand in front of my 12 ga. after 3 shells were fired to see if any more remained.