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All this talk about the 11" CAR got me thinking.

Doesn't the position of the gas port on the barrel have an influence on the amount of pressure that is bled back to the bolt? In other words, wouldn't a gas tube port closer to the chamber (short barrel) vent back more pressure than one that was further out on the barrel (long barrel)?

Seems to me I heard someone had some reliability problems with a very short barreled CAR using SS109s from Israel. I've used that ammo and it seems to be more potent in the recoil department then the standard run-of-the-mill ammo. So I wonder if this was a pressure problem?

Any thoughts?

Is there a point where the pressure would be much higher than the bolt was designed to handle reliably?
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