What you are experiencing is very typical of shotgun slug performance! They travel too slow to produce much, if any, hydrostatic shock on a par with that produced by a HP rifle bullet. Consequently, shotgun slugs kill more by hemorrage than any other effect. In this regard, they are more similar to a broadhead arrow than to a bullet! An 80 yard run is not bad at all after being hit by a slug! That's why I prefer to use a rifle, even if it has to be a muzzle-loading rifle, anywhere that slug shotguns and/or muzzleloaders are permitted!

BTW, I once lived in a county in Virginia where ONLY buckshot was legal, and had the opportunity to observe how this stuff works, or rather, doesn't work, for five consecutive deer seasons. I once saw an 85-pound Virginia whitetail buck travel 1.5 miles from where it had been shot to where it died. It had two 00 buck pellets through its' heart, and three through its' lungs, and still travelled that far. NO BLOOD TRAIL!! Had it not been for the fact that hounds are used to run deer in that county (that's how they hunt deer there!!), that buck never would have been found. There's no doubt in my mind why buckshot is ILLEGAL in most states for deer hunting! Too many dead deer left unclaimed in the woods!!