The purpose of the double blind test is to see if people can tell the difference, without knowing what they are testing.
The issue is... Most paintball "tests" are almost purely subjective.
The objective test you propose would allow for elimination of some variables, but there is still the paintball. I am considering acquiring some 3d printed paintball substitutes, in order to remove the seam, and overly flexible shell from the equation.
Brass Monkey Customs Brass Freak compatible
and Equation inserts in .665, .670, .675, .678, .680 and .685
Current Freak compatible inserts in stock:
.665 = 0, .670 = 16, .675 = 3, .678 = 4, .680 = 4, .682 = 4, .685 = 11 Still selling brass tubing, with .678 barrel stock now available!
My feedback: MCB