Originally Posted by
Johnny P
A long time friend who has been cursed with bad eyesight since he was a kid called me about his GI issue M1 Carbine and feeding problems. He had a red dot sight installed on the Carbine and the feeding problems started. He took it to a gun shop that couldn't find the cause of the problem. I brought it home along with a couple of boxes of Hornady Critical Defense ammo. Sure enough about every 3rd or 4th shot it would fail to feed. I had brought along some GI .30 Carbine, which it fed flawlessly. The recoil was noticeably less with the GI ammo, which got me to wondering about the ejection pattern. I looked at the mount for the red dot scope which used the sight dovetail, and noticed marks on the front of the mount. The ejection pattern had been changed enough that the Hornady cases were bouncing off the mount and back forward, interrupting the feeding cycle. Took the sight off, and it worked flawlessly with the Hornady CD.
That's good to know, I was contemplating a red dot mounted like that.
Phillip McGregor (OFC)
"I am neither a fire arms nor a ballistics expert, but I was a combat infantry officer in the Great War, and I absolutely know that the bullet from an infantry rifle has to be able to shoot through things." General Douglas MacArthur