My HMR is a favorite crow sniping round, and has worked great for groundhogs too, which can be some tough little critters. I don't have the exact count, but I'm guessing we shot roughly 10 groundhogs with the HMR. We lost one that managed to get into the den from a poorly placed body shot. The others dropped. One was hit in the chest with a 17 gr. V-Max as it was standing up on the den mound a distance of over 100 yards. It never made it into the den. It was a pretty good sized groundhog too.
With that one exception of the 17 V-Max, all others were shot with the 20 gr. CCI Game Point. I have all shots recorded on video showing the hunts and distances.
Even on crows, I have noticed better performance from the 20 g. vs the 17.
I can't say about fox and raccoons since I don't have any experience with those two.