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Did not think of it possibly being caused by a previously fired round. Once the rain stops i'll go out and look at the brass, I never got around to picking it up, so I should be able to find all of them and see if any have a blown primer.

The Annoyed Man wrote:Is it possible that the cam pin channel was dry, and the cam pin seized in its channel, locking the bolt in mid-stroke?

Never thought of that one, the action was pretty dry and very gritty, what baffles me the most is it was so frozen that hitting the forward assist would not even break it loose. I was looking at the case again after posting this, and noticed it is missing a small chunk of brass at the tip of the neck on one side. I don't think I broke that off with the cleaning rod as it was in the case when I was tapping on it. I'm now beginning to wonder if that piece some how ended up in the action? But then again, i'm thinking that is unlikely as it would have had to made it from where it came off, all the way back into the action and jam it before it even completed it's cycle rearward.

Anyone ever seen anything like this?

I was shooting my AR last weekend with 55 grain reloads. I had gone through 2 - 30 round mags. when I got a jam. The gun was VERY dirty as I had a suppressor on it, and had not cleaned it in 200 rounds of suppressed shooting prior to that. The bolt came exactly half way to the rear with the expended case still held by the extractor and locked solid. It locked just short of where the case would clear the port. I tried the forward assist but the bolt/carrier would not budge. I then went to my garage and inserted a cleaning rod down the barrel, and into the spent case. I began tapping with alot of force, which moved it rearward but did not free it. I stopped at some point as I realized I was beating the bolt back and not freeing anything. I then used a brass drift and began to tap/beat it forward by leveraging it against one locking lug on the bolt. After 3 or 4 taps the bolt snapped into battery. I stripped the gun down and have found nothing. No metal, no loose gas key, no broken forward assist, nothing. I then ran 40 rounds through it without a hiccup. Anyone ever seen anything like that? I hate it that I can't find anything that could have caused a jam that bad.