|
Direct from PDI themself:
Original barrel < 01Raven < PDI 01 (Cold Forged)
Additional information from PDI's own marketing literature comparing various bore sizes:
6.01mm
Muzzle Velocity: ***
Carry: *
6.04mm
Muzzle Velocity: **
Carry: **
6.05mm
Muzzle Velocity: **
Carry: **
6.08mm
Muzzle Velocity: *
Carry: ***
That should give you idea of the Nine Ball 03 vs the PDI 01.
I do NOT recommend cutting Tanio Koba Hop Twist barrels (they are 6.04mm bore) for a number of reasons. First, because it's ideal to replicate the crater cut at the tip. The purpose of the crater cut is to diffuse the projectile's exposure to the environment. The idea, is that with a flat cut, the BB will smack head on in to a wall of the outside atmosphere. Crater cuts diffuse this by gradually introducing the BB to the atmosphere, thus, stabilizing the flight path.
Unless you have a lathe, do not attempt doing a crater cut by hand or a crooked crown will pull a BB to one side.
The second reason why I don't recommend cutting Twist barrels, is because you'll not only need to debur the main edge that was cut, but you'll also need to figure out how to debur all of the grooves. That won't be an easy task.
|