Pete and Mike: There are some photos of Don Zutz illustrating the "bayonet thrust" mount in The Double Shotgun in which it appears Don has all fingers wrapped atop the barrels. Maybe poke and hope is all you need or all you have time for on grouse in which case it wouldn't much matter how many fingers in the way. I always extend the index finger along the bottom of a splinter or aside a big forend on an o/u cause somebody said I'd shoot better. Boy were they. . . WRONG!