I've never owned a drilling but have had several combination guns. The Savage 24 .22WRM/.410 I have is the best long gun I've ever found for small game of all sorts in the woods.
The Savage/Valmet 12/.222 Rem I still have is the best coyote calling gun I've ever had mainly because at dusk in the brush the darlings tend to sneak up too close for a sure rifle shot. A 12 short mag with 4s handles that creepy situation just fine. Drawing a handgun would spook Mr. C (and I'm not that confident a quick draw artist anyway!). I recently shot one with the shotgun barrel that was about 14 coyote steps from my left butt cheek! (What WAS he thinking???).
And for piggies, the 12/.308 I traded to Bruce killed 'em at all ranges and it was nice to have that second barrel loaded with a 12 guage slug when I walked up to see if the critter was REALLY dead!