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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Adding a skootch to the chrono readout?
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<blockquote data-quote="Alan Griffith" data-source="post: 846023" data-attributes="member: 4686"><p>When pulling an average velocity reading from your chronograph and taking that velocity to input into what ever ballistic app you're using, do you add a skootch more to make up the loss of speed from the muzzle to the chronograph? Someone once told me to add about 30 fps so that if my chronograph reads 2750 fps I should input 2780 fps in my ballistic program. This when the front screen of my 35P is 10' from the muzzle. Just this morning, shooting at 950 yds with a 140 Hybrid from my 6.5x47 I was impacting several inches low. This rifle/load is currently placing 5 into less than 1/4 to 1/2 moa at that range so I'm pretty sure of the drop/impact distances. </p><p></p><p>Alan</p></blockquote><p></p>
[QUOTE="Alan Griffith, post: 846023, member: 4686"] When pulling an average velocity reading from your chronograph and taking that velocity to input into what ever ballistic app you're using, do you add a skootch more to make up the loss of speed from the muzzle to the chronograph? Someone once told me to add about 30 fps so that if my chronograph reads 2750 fps I should input 2780 fps in my ballistic program. This when the front screen of my 35P is 10' from the muzzle. Just this morning, shooting at 950 yds with a 140 Hybrid from my 6.5x47 I was impacting several inches low. This rifle/load is currently placing 5 into less than 1/4 to 1/2 moa at that range so I'm pretty sure of the drop/impact distances. Alan [/QUOTE]
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Adding a skootch to the chrono readout?
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