[BloodSport]

I have a twist barrel in both a pistol and my P90. One thing we found is that with an upgraded gearbox shooting around 400fps the barrel had less accruacy and distance then a stnadard tightbore.

Running stock or slightly upgrade 333fps gearbox, I found the grouping to be much tighter and the range equal to if not greater then my standard barrel.

In my pistol shooting approximately 390fps, I found it nearly doubled the effective range of the pistol and tightened the grouping of the shots by to about a 3" spread at 60'


*EDIT*
I should also make note, that for some reason on my P90 several different chrono's cannot read fps from the gun, so it might be a good idea to carry a stock barrel with you to show that your guns gearbox is within field limits if required. I've seen 4 differnt chronos out here now that cant read the fps or it it does it says 50fps with the twist barrel, and 320 with the stock one. Tried white, black even green, and glow in the dark bb's to see if it made a difference to the chrono with no change.