Hirtenberg L7A1 test results
Conditions: Partial overcast, 70 deg F., light winds, elevation 7000 ft. (NE of Flagstaff, AZ)
Equipment:
Oehler chronograph with proof channel.
Sterling SMG, 6.5†barrel
Browning Hi-Power, 4.7†barrel
Velocity data (fps) are reported in this order...