Hi how much muzzle velocity do you lose in the first 10 to 20 feet, that's the closest I can get to the chrono, and not get an error message.
Tanks Dean
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Hi how much muzzle velocity do you lose in the first 10 to 20 feet, that's the closest I can get to the chrono, and not get an error message.
Tanks Dean
Depends on the load of course but for a 130gr .264" VLD starting out at 3005.6fps it is down to 2998.9 at 12ft, down to 2997.2 at 15ft and down to 2993.9 at 21ft.
A 500gr Hornady roundnose started at 1500 is down to 1491.5 at 12ft, 1489.4 at 15ft, and 1485.2 at 21ft.
A great and very capable online ballistics program is JBM Ballistics Trajectory Calculator.
http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
Both calculations were done at 1000ft ASL and at 59* temperature.