I think the proportions are off because the fellow might be a pretty small guy. One of the first things I noticed was his boot tie downs at his ankles, the right one seems to snug down on a pretty skinny looking leg. The screw sits low in the forearm and probably clears the magazine tube. It may just be a repair.
Back to proportions, I'd figure a coyote is a coyote more or less. Those pelts look wolf sized on that horse, probably some sort of pony, and if they were held up next to that guy or the rifle. I think smaller hands are holding the rifle.
Based on the pencil contour barrel, front sight and forend cap, I'm going to revise my guess just a bit to a Win. model 92 special order SRC. If they fit the rifle, those might be 32-20 shells in the belt loops, because I think 25-20's would look a tad more bottle necked.
edit to add, that building behind him to the left of the picture looks a little different, dormitory like. I wonder he's an Amish or similar kid, and his clothes have a little to do with what might be seen in that sort of community.
Last edited by craigd; 06/02/19 12:20 PM.