There was a time I thought 2's were needed for sage grouse.
I found 1-1/4 of 7.5's killed the chit out of things..it was a transition, as I sometimes had 6's or 4's in the second barrel. At some point I went to 7.5's in both barrels, for all upland.
I dont know..keep on top of them, and they just work.
