When you say milled down,was it shortened? If so this would shorten the amount of time gas is entering the gas system.
You could also have fitted the new gas block slightly off and it's blocking part of the gas port in the barrel.
When you say milled down,was it shortened? If so this would shorten the amount of time gas is entering the gas system.
You could also have fitted the new gas block slightly off and it's blocking part of the gas port in the barrel.
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