Ok, so here is what we found so far.
1) Carbon pattern on the gas port was fine, gas block is ok as is tube, all measured, checked and reinstalled.
2) Bolt inspected, rings are staggered as they should be, nothing is binding.
3) Key is tight and staked properly
4) Everyone moves easy, no binding, etc...
5) Gas port is fine, checked the size, it's in spec and not obstructed.
So what was recommended to me by the guy at NPR Ammo, as well as a customer that was listening to us talk, was to try a heavier buffer.
They didn't have any in stock, so when I went to Dead Center in Buford to see if they had one, I talked to Van, and he mentioned to me that after I left yesterday, the same thing occurred to him. That if the buffer is too light, then the pressure could push the bolt back a split second too soon, before enough pressure builds, making it push the buffer back kinda weak... A heavier buffer would slow it down a tad, allowing more pressure to build, so when it does slam back, it does so more forcefully and should cycle better and not short stroke. They all said, 5.56 being a higher pressure round, might have enough pressure even if it is coming out of battery a fraction of a second faster than it should... And so it might function while 223 might not.
Everything else on the gun seems in spec and fine, so I figured why not give it a try, and picked up an H2 marked buffer and will head to the range later today and see how it functions. I will also take both the buffer and my DD BCG from a rifle that I know is good, just to see if they were to make any difference. Process of elimination, but with any luck, the heavier buffer will slow things down enough that the .223 has time to build up more pressure... The heavier bolt should also help when firing 5.56, as it was already getting scored up from the BCG when firing it.
I will report back on what happens when I get it to the range.
1) Carbon pattern on the gas port was fine, gas block is ok as is tube, all measured, checked and reinstalled.
2) Bolt inspected, rings are staggered as they should be, nothing is binding.
3) Key is tight and staked properly
4) Everyone moves easy, no binding, etc...
5) Gas port is fine, checked the size, it's in spec and not obstructed.
So what was recommended to me by the guy at NPR Ammo, as well as a customer that was listening to us talk, was to try a heavier buffer.
They didn't have any in stock, so when I went to Dead Center in Buford to see if they had one, I talked to Van, and he mentioned to me that after I left yesterday, the same thing occurred to him. That if the buffer is too light, then the pressure could push the bolt back a split second too soon, before enough pressure builds, making it push the buffer back kinda weak... A heavier buffer would slow it down a tad, allowing more pressure to build, so when it does slam back, it does so more forcefully and should cycle better and not short stroke. They all said, 5.56 being a higher pressure round, might have enough pressure even if it is coming out of battery a fraction of a second faster than it should... And so it might function while 223 might not.
Everything else on the gun seems in spec and fine, so I figured why not give it a try, and picked up an H2 marked buffer and will head to the range later today and see how it functions. I will also take both the buffer and my DD BCG from a rifle that I know is good, just to see if they were to make any difference. Process of elimination, but with any luck, the heavier buffer will slow things down enough that the .223 has time to build up more pressure... The heavier bolt should also help when firing 5.56, as it was already getting scored up from the BCG when firing it.
I will report back on what happens when I get it to the range.
