Took her to the range. I had 13 cartridges to shoot (in the rain). I shot at 50 yards from a sandbag rest. Load was 37 grains of AA2495 with 200 grain round nose Lee home cast bullet. Group size, (3 shots) after I figured out (sort of) the sight picture, was about 1.5". The load is one i use in my small ring Mauser and shoots well in that rifle and the 8 seems to like it too.
The bullet is from a 6 hole Lee mold that was purchased from a group buy with the Cast Bullet association, if I remember correctly. It actually casts at .360". The lead composition is wheel weights with a little lino thrown in and water quenched. I use the bullets as cast, no sizing and lube with Lee liquid Alox. I also use a little (.5cc) cereal filler between the powder and the bullet. (If you tell many people you do that they'll fuss at you. Use load at your own risk.

The recoil from the model 8 isn't bad, but that double bump does feel different from the bolt action. Some people say they can hear the mechanism moving, but I can't. With my little M1 carbine I can hear the mechanism, but not with the Model 8. I enjoyed shooting the 8 and everyone who has seen it has been very curious. They were all familiar with Browning's shotgun but not the rifle.
Next time I shoot it maybe it won't be raining and I can test some more loads and provide pictures here.
David