Too much gas?

Is a sign of too much gas on an AR10, 308, a non-feeding issue? This thing shoots twice then won't feed. Once the third round got a bit mangled as the bolt tried to "jam" into battery. Mostly, it will pick up the third round, it looks like it's in battery but won't fire. There is no forward assist. Or, I should look at something else?

Thanks you sir. I'm not sure about it locking back as it will take the "last" round and attempt to place it into battery. If it had a forward assist, I would think a bump might get it there. One round, the third, it just mangled. It mad me think it was trying so hard to shove it forward the round did not have "time" to go forward. And I wondered if the concept of "bolt bump" is here? If I even know what it is, but I'm thinking that it shoves the round in hard enough that the bolt backs off or "bump's" off? Is any of this correct? If I recall, the spent rounds end up more at 2 - :230. I can't thank you enough for the help here!

BBBBill said:

Home built or factory? If home built what parts were used? Some don't play well together.

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Home built. And yeah your right. When I try taking parts off of my .308 Black Rain - a company I do not support - I see differences in several pieces. BSF made the barrel and sold me the gas tube and block. I can not recall the bolt. But the Black Rain's bolt will hit the insides of the build's upper. The gas tube is an issue as I have half the folks telling me it's too long and the other saying it's too short. I've gotten pic's of other's .308's with the tube being in one or the other as if it doesn't matter. I suck but it's fun to learn. It's not a money or time thing. It's fun, was fun, and I'm learning a lot from folks like yourself. Thanks!

NIGHTLORD40K said:

What kind of magazines are you using?

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P-mags, One is 10, the other is 20. I going through a bit of ammo trying to figure this out. That doesn't bother me except Ya can't find the stuff. I reload .308 but I fear I might be adding another unknown. Thanks