Just guessing, but the shape of the action and hammer look all wrong for a Bullard.
Somethng is not right with all the proportions of the different things in the picture. When compared to the size of the pelts, that rifle and maybe other things in the picture could be smaller than seems on first appearances.
With the short magazine tube, non crescent appearing butt, maybe not a very large stature fellow for all sorts of reasons, I'd guess it's a special order Winchester '94 lineage rifle, and those shells might be 30-30's. Fun exercize, maybe his dad came in from the remote trapper cabin and told him, hey go stand on the horse and let's see if uncle Irv will take a picture.
