Check out the post at
and you'll see a great post about OO buck. The guy is right on the mark.
Keep in mind that at the closer ranges 6 shot is every bit as deadly, and is a lot safer as far as overpenetration is concerned.
Some of you may remember using it at a shotgun match at Izaak Walton on full size poppers at 35 yards. Even if you got a few on a lightly calibrated popper there was no guarantee it would take it down. Observing good shooters get frustrated on a test that OO should excel at clinched it for me. That is the most overated stuff on the planet. If the targets were any closer birdshot would have been better. Slugs would definitely have been better. There is no room for OO buck on the shelves in my gun room.