Well, the reballs may be more consistent in size from one to another then paintballs, but unless you used the same reball for every test shot, I believe your data is applicable to paintballs as well.

By using the same reball and same insert for every shot in my tests, I tried to remove the ball/bore match from having any influence on shot to shot and test to test consistency. Cockerpunks consistency data may not apply when using the exact same reball for every test shot. As you know, his recommendations as far as consistency is concerned, was for either an under bore or 1 or 2 steps up from a "blow test" ball/bore match. That recommendation was based on the fact that paintballs vary in size. Therefore the bore needs to be either small enough to disallow "blow by" or large enough to compensate for the size variance of the paintballs to achieve the best consistency. Even tho the .679 insert I used was a considerable "over bore" with my reballs, (more than just a 1 or 2 step up from a "perfect match blow test") it was the same identical over bore for every test shot. As I mentioned earlier, my reballs were a very tight fit in the reball insert. In fact, and as I remember now, so tight that after several shots I could see "scuff marks" inside the reball insert. I thought that the friction and scuff marks may have an inconsistent influence on shot to shot consistency so I used the next larger closest insert, the .679. Theoretically, using the same reball on every shot should produce similar shot to shot consistency regardless of the insert used. (At least as far as ball/bore match is concerned)

I guess my point is that I don't think using the reball insert instead of the .679 will net an improvement in consistency in the context of my tests because there was no variance in the size of the reball from shot to shot.
However, I can see how an under bore, be it paintball or reball, will obviously be more air efficient. My testing however leads me to believe that a tight fitting, dull surface, rubber reball produces a considerable amount of friction inside the insert, possibly more than that of a glossy shell paintball in the same environment.

That said, I believe your tests were very comprehensive and probably conclusive relative to paintballs/bore match/consistency, (not withstanding possible friction/drag issues). It would be interesting to see how using the same reball for your tests would effect the data.

Once again Odin, excellent work.

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