I'm not the expert that some of the guy's on here are but switching to a longer tight bore barrel should give a small fps increase. The bb is then also kept in a straight line longer giving a accuracy increase. I was worried with my 650 barrel because there is a chance if you go too long without other mods that the piston will actually suck back the bb a bit and screw all of that up. As far as increasing range, combination of fps, weight of bb, and proper hop seems to be the key. Perhaps He's talking about the "new" wide bore barrels which some ppl are now swearing by but I've not seen one in action...