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Originally Posted by Vivisector
These things would have the opposite effect on FPS than a tightbore, wouldn't they? I mean, more air is getting past the BB and all...
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When comparing velocity to a Prometheus 6.03mm inner barrel in a 400fps M14, the TWIST inner barrel was only about 5fps less on average, showing that they are still tighter than stock inner barrels.
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Originally Posted by CDN_Stalker
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Originally Posted by Kid
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The twist inside these inner barrels are optimized for guns that shoot NO MORE than 1 Joule or 330fps with 0.20g BBs. Some internet debates claim that if you have a higher powered gun, all you need to do is use heavier BBs to slow down the velocity of the shot. NOT TRUE.
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Point, but counter point, wasn't talking about using a heavy BB to slow down the velocity, was talking about the stability of the heavier round, and mainly the comparison of tightbore vs. twisted barrel, at those velocities with heavier rounds, would the twisted barrel shoot a lot worse than a tightbore (ahem, or even a stock barrel). Have to wait and see what Illusion comes up with using the barrel in hot guns, and most likely he'll test with a range of ammo for a broad range of results in different conditions. |
It doesn't seem to matter if heavier BBs are used. At high velocities, the BBs just seem to fly everywhere at the end of their range (powered by the gun's initial energy, and not from Magnus effect), and I'm thinking it may be because the TWIST inner barrel does put some kind of gyro spin on the BB.
Further testing is required to verify this information.
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Originally Posted by gandar
....You're still missing it. A tightbore doesn't touch the BB either. If you could use a tightbore Twist barrel, you wouldn't be spinning the BB (still) you would just be creating a smaller space AROUND the BB for the air to go past, which seems to be where the problem is when using higher velocities in the Twist barrels.
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That statement contradicts two of Japan's oldest airsoft manufacturers. Both Systema and Tanio Kobayashi claim that BBs DO bounce around inside an inner barrel. Systema claims that BBs have a tendency to bounce around an inner barrel even more when the bore is tighter, and which is why they stick to a 6.04mm process and won't go tighter.
This is a good read:
http://www.systema-engineering.com/E...unchiku3-1.htm
Of course, there is no substantial evidence to verify any of these claims.
Range tests need to be performed to verify.