Ammo companies claim 200 yards, really? For several years I've had an ongoing bet with a friend. Post a 6" target at 175 yards (max he can shoot from his stand) and he fires 3 shots from a wood bench, without bags, much like hunting from a stand. For each hit, I give him $5. I've yet to pay out a penny. The thing is, I really want him to do it, I hope to see it done. I've watched other guys shooting only to 100 yards but no bench. Any hunting position and take your time. Hits are made but only after 5 or 10 rounds, NEVER on first or second shot. Rifled tubes are great with sabots and I think Cintax has it right, about 125 yards max. But you have to try it out yourself to see if you can hit at that distance.
Power Pill, how far were the deer you shot, I'm very impressed. I've tried 3 smoothbore barrels and none of them can consistently hit a 6" target at 50 yards. I can hit 2 out of 3 on the outer edge (good enough) but the 3rd is off target by at least 6", that's 12" from the target centre. Personally, I'd go for the rifled tube but if you have a smoothbore, give it a try just to find out for yourself.
I'd like to see some guys post their targets. Slug, buckshot, smooth bore and rifled tube. It would be nice to see what can be done, not just what a manufacturer says.