I have an 1100 20 gauge that I started using last year and they shoot really well through them. I have not harvested a deer with them yet as I usually tag out (at least, doe tags) in bow season.

My gun really prefers the buckhammers. I tried the Winchester Platinum tip sabots and the groups were several times larger.

I think they would really do a number on deer. Just the wound channel would be huge and they should pack a punch at short ranges.