Quote:
Originally Posted by JJ_BPK
I know the mechanics of the AR action, thank you.
My question dealt with the kinetic energy after the bolt was unlocked and started the ejection. After the bolt is unlocked there is no metering of the rearward movement other the mass of the piston and resistance of the recoil spring.
In affect the 5.56 bolt must be creating the same kinetic energy as the 50 Beowulf,, or something will break???
Also,, I didn't say shear,, The frame actually dissolved from perspiration. 15 to 20 % of the M16 we carried had moderate to severe rot in the area of the front pin.
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I am not familiar with corrosion on early M16's.
However in regards to the second aspect, the force used, and the velocity that the bolt unlocks is going to be affected by gas port pressure, the size and location of the gas port, and the powder/bullet combination being used. Chamber pressure is not going to affect how the bolt unlocks. In other words, the gas-port on a .223 Remington is going to be a different size than the size of a 50 Beowolf (if it produces more gas port pressure).