06-23-2011, 10:03 PM
First of all thanks for the replys. I talked to the gunsmith at McGowen barrels today. He stated that a .062 gas port hole is small but that's the way they ship there AR barrels out. If the bolt doesn't funtion then drill it out with a drill bit in 100 thousanths increments untill it functions.
I also talked to Robert Whitley from 6mmAR.com and he stated that 100 thousand increments seems to much becaue he works in 3 thousand increments. His guess would be a gas port size of .0850 to .0950 for a 20" barrel. He also questamated that a .0620 was to small of a gas port for this round. Robert states that when he custom builds his ARs that he starts with a smaller gas port size. Then he goes to the range with a cordless drill and some drill bits and the rifle. He takes a shot and if the bolt doesn't cycle then he opens up the gas port in 3 thousanths increments untill it cycles. Then once it cycles he goes 3 thousands more for good measure.
I think that this is the route that I'm gonna take. If anyone has any input please reply.
Thanks,
Shivesy
I also talked to Robert Whitley from 6mmAR.com and he stated that 100 thousand increments seems to much becaue he works in 3 thousand increments. His guess would be a gas port size of .0850 to .0950 for a 20" barrel. He also questamated that a .0620 was to small of a gas port for this round. Robert states that when he custom builds his ARs that he starts with a smaller gas port size. Then he goes to the range with a cordless drill and some drill bits and the rifle. He takes a shot and if the bolt doesn't cycle then he opens up the gas port in 3 thousanths increments untill it cycles. Then once it cycles he goes 3 thousands more for good measure.
I think that this is the route that I'm gonna take. If anyone has any input please reply.
Thanks,
Shivesy