First time trying the Kent Bismuth today. Was shooting a 12 gauge Rizzini O/U, choked IC and Modified. Hunting pheasant on SD public land. Flushed 3 roosters, first one was about 15 yards, the other 2 my dog flushed at about 20-25 yards. All 3 birds dropped on the first shot at each. Autopsy results showed broken wings and legs, as well as shot going through the breast into the vitals. One was going away, the other 2 were quartering away shots.
The shot had no problem going through feathers and bones. I was using the bismuth #5 shot, going 1350 fps according to the box.
My usual go to load is the B&P Long Range 1 1/4oz #5. The Kent shells didn't recoil as bad as the B&P shells. However the shot dragged in feathers worse than the plated lead shot of the B&P shells. These were lightly feathered, young of the year roosters but they were still pretty sturdy with heavy bones and full plumage.
Obviously this is very unscientific but this is the first time I ever used anything for upland other than lead. I was very happy with the performance of the Kent bismuth and plan on using it for the rest of the season. Hope this helps!