200 yards is probably about max. You might give it an wxtra shot of propellant and go a little over that occasionally, but not often. Usually the tater doesn't seal off in the barrel well enough to get max range. The same guy who built the one in the pics also built one with interchangeable barrels. You can load all three barrels, then charge the chamber, screw the barrel on, fire, change barrels, fire, etc. Sort of like a mortar tube. They've toyed with the idea of using it in our airsoft battles, loading the mortar with airsoft bb's sort of like grapeshot from a cannon. His smallest barrel is 3/4". That one sounds like a .22 going off. Won't shoot very far, but it's a lot easier to find spuds for it, and it wastes a lot less tater.