Ok good.
I am also trying to recall if the buttstock fit can cause this, but the old brain in not being helpful right now. Bring a different stock along with you just in case.
:thup:
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I believe some 69 lc was delinked MG ammo and a little hot
Actually the de linked L.C. machine gun ammo was a little "cold" which really surprised me too. Some of it chronographed at between 2600-2700 fps which is actually below the spec. It works well in all of my rifles though.
Is the LC delinked machine gun ammo ----it may be too hot for your M1