That is odd. I can't say I have ever seen a 25 Horn HP from my .17 Rem do anything but put a small hole in a critter, then blow up inside and not exit. I can't think of any neck shot coyotes I have taken with that bullet/round but I am sure I have done it. The only "bad" thing I have seen them do is take the front leg off of a red fox I shot a bit low one time. This includes a lot of thin skinned critters like rabbits, though it'll tear a prairie dog up like most anything will.
I have a few thousand of them left, but they're all manufactured from within the last few years.
Ive only shot a couple coyotes with them. No exits. Shot a pile of grey fox with them and it was pretty dramatic....glad I wasn't trying to save the hides kinda dramatic.
All solid chest hits or around the edges? I never have shot a grey (missed one in North Carolina but that's a different story) but they sure look small and fragile. I could see any higher velocity bullet being rough on them.
