I hear you about the flight control wad; it works wonders. The law enforcement ammo is loaded to a lower velocity for reduced recoil and so is, in my opinion, still a bit light for deer. However, the full power Federal buckshot WITH the flight control wad is available. I hate to receommend them (the store, not the ammo), but Tyee Marine in Campbell River had a good supply a few months back and probably still does. Hope this helps.
Cheers