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Shot some American Gunner today and it is showing signs of over pressure
#4
Those velocities are CRAZY fast.

DON’T SHOOT IT TIL YOU FIGURE THIS OUT!

Yes, check chrony with a known gun and factory ammo; caliber doesn’t matter but you want to rule out faulty operation of chrony.

Yes, do chamber-by-hand test. It should drop out or at least drop out with a tap.

Can we assume you have a group buy bolt with Mk136 boltface?

Pressure equals velocity so you are way overpressure.

DON’T SHOOT IT TIL THIS IS RESOLVED.
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Shot some American Gunner today and it is showing signs of over pressure - by BluntForceTrauma - 07-08-2018, 01:21 PM

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