The other guys have mentioned the slightly weaker accuracy, higher ricochet risk, and NO expansion, so I won't elaborate other than to agree...

One random example. A prairie dog hunting trip, I had a .223 AR-15 with hollow points, and my buddy had his Winchester SX-AR .308 with FMJ's.

There was NO mistaking when I made contact, but several of the dogs he hit would run. When we walked the p-dog town after the day was done, we found several that he had hit that had made it back to the mouth of the hole, a blood spot on the right, and blood spot on the left. It looked like they'd been shot with an arrow. Counting empty shells compared to carcasses, he had some "unconfirmed kills". I was spotting for him, and we accounted for MISSES, but most of what he hit ran off, and some made it down the tube before they died. And that's a .308 on a P-dog.

On the other hand, the head of a coyote is as big as a P-dog's body and their heart is about as big as a fist, so if you can guarantee head or heart shots, then FMJ's are fine. But you have to be ready to pass on shots that aren't perfect.

Since you have them, then you can make them work, but they're FAR from what I'd consider "choice ammo" for hunting ANYTHING except paper.