Author	[Modern View]
Dauber 11-27-2012 15:35:03 68.254.164.17 Report to Moderator	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. [Reply]   [No Email]
FarmerZeb 11-27-2012 16:10:38 76.92.148.33 Report to Moderator	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 [Reply]  [No Email]
BushogPapa 11-27-2012 20:31:33 173.88.51.117 Report to Moderator	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.. [Reply]  [No Email]