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  #16  
Old 01-13-2021, 12:28 PM
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dimples?



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Gold balls are made with a dimpled surface because that reduces the drag coefficient and they travel further.

Scaled up - Myth Busters did a test on cars to see if a dimpled surface would improve gas mileage. They proved that it does.

Scaled down - It would be very interesting to know if 22LRN with surface dimples would be less affected by wind drift at near supersonic velocities.
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  #17  
Old 01-13-2021, 01:02 PM
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The shapes of golf balls and cars are not aerodynamic and therefore subject to surface turbulence.

Bullets are designed with aerodynamics in mind, and therefore have laminar flow over their length. Minimal drag.

Same with airplanes - if surface dimpling was of any benefit, you can bet they would add it. Even a tiny increase in efficiency is worth huge sums at scale. That's what winglets are for.
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  #18  
Old 01-13-2021, 03:10 PM
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While popular with a segment of the general public, the Myth Busters fellows are not the final word on most scientific questions.

If dimples on cars added significant efficiency, why wouldn't this guy, who doesn't have them himself, use them on his cars? Do his rockets have them -- or any rockets?



As for dimpled bullets, see this April 1, 2009 report http://bulletin.accurateshooter.com/...impled-bullet/

Before anyone wonders why they don't see dimpled bullets on the shelves of gun shops, they may wish to read this report published on April 10, 2009 http://bulletin.accurateshooter.com/...l-web-readers/
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  #19  
Old 01-13-2021, 03:18 PM
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  #20  
Old 01-13-2021, 03:29 PM
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Quote:
Originally Posted by Penage Guy View Post
While popular with a segment of the general public, the Myth Busters fellows are not the final word on most scientific questions.

If dimples on cars added significant efficiency, why wouldn't this guy, who doesn't have them himself, use them on his cars? Do his rockets have them -- or any rockets?



As for dimpled bullets, see this April 1, 2009 report http://bulletin.accurateshooter.com/...impled-bullet/

Before anyone wonders why they don't see dimpled bullets on the shelves of gun shops, they may wish to read this report published on April 10, 2009 http://bulletin.accurateshooter.com/...l-web-readers/
I saw a lot of dimpled cars when I was stationed in Texas - right after major hail storms!
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  #21  
Old 01-15-2021, 09:16 PM
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Quote:
Originally Posted by Chaser View Post
You keep using this term "jacketed 22 long rifle" .. no such thing.. take it OUT of your vocab.
I beg to differ. Remington made FMJ rimfire ammo for the military
Attached Images
File Type: jpg T42 and M24 boxes.jpg (128.5 KB, 45 views)
File Type: jpg T42 box and cartridge.jpg (91.5 KB, 44 views)
File Type: jpg M24 box.jpg (85.5 KB, 46 views)
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  #22  
Old 01-15-2021, 09:36 PM
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Fmj

What gun were they shot in?
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  #23  
Old 01-15-2021, 09:49 PM
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I would suspect it was used so as not to run afoul of the Hague convention.

I believe there were a number of different pistols in use ( probably rifles too), I believe the OSS and other Covert groups used High Standard HD Military models, often with suppressors.

I am not an expert on this though.
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  #24  
Old 01-15-2021, 10:25 PM
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I stand corrected.
There is no such thing today. Fixed it.
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