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
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.
Both calculations were done at 1000ft ASL and at 59* temperature.
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
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