Brand
 Version
 Weight
 Thickness
 Dia Pole
 Dia Seam
 Fill

Draxus
 Heat
 3.28g
 .018


 Peg

Nelson
 Tactical
 2.62g
 .010


 Oil

XO
 CamoTac
 3.35g
 .015




RPM
 Evil
 3.18g
 .011


 Peg

RPM
 Marbilizer
 3.10g
































































































This post is a work in progress... More data and information to come.Objects in motion are said to have a momentum. This momentum is a vector. It has a size and a direction. The size of the momentum is equal to the mass of the object multiplied by the size of the object's velocity. The direction of the momentum is the same as the direction of the object's velocity.
If the mass is kept constant, then the momentum of an object is directly proportional to its velocity. If the mass is kept constant at a value of 3 g. The velocity changes from 0 m/s to 10 m/s while the momentum changes from 0 gm/s to 30 gm/s. This creates a straight line graph when momentum is plotted as a function of velocity. (The symbol for momentum as a function of velocity would be p(v).) The straight line graph demonstrates the direct proportion between momentum and velocity.
That is, if one were to double the velocity of an object, then the momentum of that object would also double. And, if one were to change the velocity of an object by a factor of 1/4, then the momentum of that object would also change by a factor of 1/4.p(v)=mv
Momentum = Mass * Velocity
Nelson Tactical = 2.62g
280 feet/second = 85.344 meters/second
223.59 = 2.62 * 85.34
So Nelson Tac has a momentum of 223.59 gm/s (gram  meters per second)
XO CamoTac = 3.35g
280 feet/second = 85.344 meters/second
285.89 = 3.35 * 85.34
So XO CamoTac has a momentum of 285.89 gm/s (gram  meters per second)
This number obviously drops as the velocity drops but which would you rather shoot from your marker...
Helpful Links...
http://www.automags.org/resource/tech/tomstech/index.shtml
http://home.comcast.net/~dyrgcmn/pball/paintball.html