I ask because I wondered if you would hunt capercaillie with this, and how that would affect your choices of chokes.
Hunting capercaillie means walking mile after mile. That's why I prefer a light gun. Furthermore my hunting is either with pointer or flusher so normally there are no long range shots. Capercaillie is very sneaky bird, running before the dog like a rooster pheasant and often trying to flush behind a tree. It's not easy to get one.
You could optimize with steel for the common uses and then switch to Bi for just those few instances where you need something else. For years, I shot steel on everything except geese. I bought some Bi for just that purpose and a little goes a VERY long ways when it comes to geese for me. 20 shells lasted several years in my instance.
That's a great idea. By the way, I bet you get more shots on geese than I do on capercaillies.