I was told also that the Winchester Wind Chokes will work on that gun. My wind chokes are unfortunately in 20 gauge as that was what I preferred when hunting pheasants and quail.
There are two ways to load that bad boy (and by the way it is beautiful. You should send me that wood stock you will not like it.).
80 grains of APP 2f, over the powder card, fiber wads, 6 & 7-1/2 shot. If you dump 80 grains of powder, dump 80 grains of shot, then an over the shot card. This will reach out to 25 yards.
Turkey load... 90 grains of APP 2f, a 3-1/14 stiff shot cup, and equal measure of 6& 7-1/2 shot from a second shot cup, then a over the shot card. This load kicks like a mule but is good out to 30 yards.
Grouse load... 80 grains of APP, a standard plastic shot cup, equal measure of 7-1/2 shot from a second cup, then an over the shot card. Good to about 25 yards although I did feather one at over 30 yards with this load. Dog could not find it though..