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06-01-2020, 11:04 #11
- Join Date
- Jul 2011
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- BFN Freestate
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- 45
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- 12,070
Re: Insight into Gyroscopic Bullet Stability and Velocity
That is why I asked, it’s not possible to shoot that bullet at ANY speed and have it not being overly stabilized, at 1100 ft/s you will have a stupid high Sg already.
Casting is one subject I have no personal experience in, but, if you ask me, stability could very well actually be the problem in this debate, just the reverse of what the OP asked about. Bullet skipping is in fact a lack of stability, not so? If you had a slower twist rate then it would be possible the bullet had a better chance of gripping with the same material that does not in a 1 in 12 twist. If you make the lead harder then you can give it a better chance of interacting with the grooves of the barrel.
So the physical problem is the hardness of the alloy, but the result of the problem is a lack of gyroscopic stability, the very thing the OP asked about.
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06-01-2020, 14:54 #12
- Join Date
- Apr 2019
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- Cape Town
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- 1,777
Re: Insight into Gyroscopic Bullet Stability and Velocity
One thing that is very clear from drag curves is that you need a lot less spin at sub-sonic velocities to stabilise projectiles. Couple that to the fact that the best performing ogive shape is eliptical, you can shoot very heavy projectiles with conventional barrels at sub-sonic velocities without fear of stripping lead in the rifling.
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