But don't sweat the break in too much. It's like two boxes of the minimum recommended shell, which is a 2 3/4", 1 1/4oz shot charge, 3 dram eq. shell. Basically, field loads. I followed the recommendation (and then some, because I also shot a bunch of 3" shells ranging from steel BB goose loads to 3" 2oz Hevi-Shot turkey loads), and did see a noticeable decrease in perceived cycle time after about a box and a half of shells. But even from the start it never failed to cycle anything. I even mixed up shells, with 3" mag shells following 2 3/4" shells to see if the action would cycle the bigger shell after the lesser recoil of the shorter shell. It went boom-boom-boom (boom-boom with the plug removed!) every time.

Mike