acute angle
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The 5.56 cartridge has a different neck angle from the .223 Remington, generates higher chamber pressures, and has different weight projectiles available. .223 Remington can be safely cycled through a rifle with a 5.56 chamber, but it is not recommended to use 5.56 ammo in a rifle with a .223 chamber.
30% of 223= 30% * 223= 0.3 * 223= 66.9
512923 x 223 = 223 x 23..........223..........x23=======..........669......+ 446========........5129
It is: 223 = CCXXIII
For example, 0 Kelvin (or absolute zero) is -273 degrees Celsius, so 50 kelvin would be -223 degrees Celsius! just subtract 273 from the Kelvin temperature.