Under gassed?

[Flyby]

I measured the gas port with calipers, it was around .084. I bought a set of bits at 1/64th increments and used those to see what the largest bit was that would fit the gas port. Its was a .083. There's where I hit a problem. The gas port wasn't opened up all the way through. It looks like they used a depth limiting device that didn't round out the hole. I was down to a .067 bit before it would go all the way through. I didn't go with a larger port size, but used the .083 bit to round out the hole. It seemed to make a difference with the "blow" test.

Need a range test now.