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Bill Murphy, how were velocities actually measured back then over 100'? The ballistic chronograph as we know it was not invented until the 1950's. Number 7 is no longer a popular size but a 7.5 fired at 1298 fps is going 1030 at 10 yards, 836 fps at 20 yards and 704 fps at 30 yds. The average velocity would be 967 fps from muzzle to 90'. Do you think all the loads listed were around 1300 fps muzzle velocity to be so consistent over 100' per the chart?
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