I used the accelerators on coyotes and fox in South Dakota and Montana back in the late 80's. I probably still have 2-3 boxes somewhere. Seems they didn't group as tight as I would have liked, but they weren't spraying all over the place either. Most shots were under 200 yards, probably majority in the 75-100 yard range after coming in to calls. Didn't damage the pelts that much as I recall.