You have it backward - putting a can on it means a SMALLER gas port.
I would be pissed off if my rifle didn't run any better than that. I've never seen a cut barrel that ran until the port was opened up to totally inappropriate diameter.
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First, unless you specifically told ADCO not to open the gas port, they probably did it anyway.
Secondly, as was said, you have it backwards. You do not open up the gas port if you plan on running a can.
The failures you are experiencing are totally unacceptable.
Forgive me if I missed this in all the verbage... but are you running an H3 Buffer? If not, you should be.
From my calculations you spent roughly $200 on ammunition and had a 10% malfunction rate. That's an expensive lesson.
I would get some PMC Bronze ammo, load one round into each mag, and with a weak grip and shoulder, make sure that everyone one of them locks back. They may all be the same make of magazine, but may have springs from different batches. You want to minimize the variables.
Well I don't think he's sure of the port still being .062. Weak ammo should run better than that.... but shit ammo (PRVI, Wolf, etc., )shouldn't be expected to run in any gun.
My point is that a gun that short should NEED a heavy buffer to control the bolt speed.
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