You will always struggle with 240s on a carbine length gas system
220s should be no prob
What factory ammo - 208s?
Try 10gr of 2207 (4198) with 220s
You will always struggle with 240s on a carbine length gas system
220s should be no prob
What factory ammo - 208s?
Try 10gr of 2207 (4198) with 220s
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