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Tractor Talk Discussion Forum

Re: Gun Experts? 5,56 VS .223

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Dauber

11-27-2012 15:35:03
68.254.164.17



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The over all size is very close but the pressure is higher on a 5.56. You can shoot .223 in a 5.56 but not 5.56 in a .223.




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FarmerZeb

11-27-2012 16:10:38
76.92.148.33



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 Re: Gun Experts? 5,56 VS .223 in reply to Dauber, 11-27-2012 15:35:03  
i agree with what KEH said

5.56 is around 62,000 units of pressure

.223 is a max pressure of around 55,000 units of pressure

(measuring pressures is highly technical and there are several different methods and many variables i give the numbers only for comparison purposes)

additionally the 5.56 chamber allows for greater variance cartridge sizing to allow for better inter-operability with in NATO countries.

the bottom line is they are not the same round they are governed by different standards organizations (.223 by SAAMI and 5.56 by NATO)


-Paul
US Army Ordnance Officer

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BushogPapa

11-27-2012 20:31:33
173.88.51.117



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 Re: Gun Experts? 5,56 VS .223 in reply to FarmerZeb, 11-27-2012 16:10:38  
You all seemed to miss the one item that effects accuracy with the 62 grain Bullet.. The 62 grain bulled requires a MUCH Faster Twist than a 55 grain, to stabilize it.. We are talking a 1 in 7" twist, for the Mil Spec Ammo.. 55 Gr will shoot fine with a 1 in 10" twist..

Ron..



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