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Originally Posted by ILLusion
Okay, I understand what you're trying to say now.
I don't believe the high power failure is because the air starts to go past the BB. I believe it's because the rifling grooves are only optimized for a certain power rating. If the twist was stretched out or tightened up (I'm not too sure on the physics behind rifling), then it may be better optimized for high powered guns.
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Slowly but surely, my brain is turning on.... Anyway, I think you *may* have mentioned that before. It does make sense that it would work that way (try pushing something loose over a spiraled column of some sort, if you push it slowly, it'll follow the grooves, but if you push it quickly it skips over them), however I'd be curious to know how difficult it would be to spin those grooves down a barrel, and if it would be feasible/possible to try recreating them at a more optimized ratio, be it shorter or longer. I would guess that the twist would have to be stretched more, and I'm sure there's a point where it would cease to be effective, but if it's reasonably possible to "rifle" a standard, or tightbore barrel with similar grooves on a different scale, it would be interesting to see the results.
Maybe MadMax the machine shop guru could shed some light on the difficulties involved in doing something like that...