I don't have one favorite combination I use for everything.
For instance, for Blue Grouse in the back country, I like my 28 ga., 870 Remington with a IC choke, and 3/4th's an ounce of 6's or, if the Mountain Quail are common that year, I might use 7 1/2's for both.
Gambel's Quail, however, I prefer my old SKB, O/U, 12 ga. with heavy trap loads, 7 1/2's, with it's modified and full chokes. That's because I half of my shooting is beyond 30 yds. with them whereas I never do with Blues or Mtn. Quail.
Other game falls somewhere in between those two extremes as a rule. E