Like above, 5 or 6 shot work nice for squirrels. I usually mix the 5 & 6 together. I wanted to mount a pine/red squirrel. 5 & 6 shot peppered the hide to much. Their hide and fur seemed to be on the thin side compared to there cousins. So I tried 7 1/2 shot. It was easier on the fur. Red/pine squirrels are fun to hunt too. They may be smaller but they make a lot of noise. I use my 58 cal/24 ga trade gun.