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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Muzzle velocity correction?
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<blockquote data-quote="Forester" data-source="post: 284080" data-attributes="member: 11102"><p>Is there a calculator out there that will give me an actual (predicted) muzzle velocity correction based on how far the Chrono was from the muzzle? I was doing some load development today with my new 204 ruger build but the hay was so high I had to sit the Chrono twice as far away as I usually do to get it on the right height.</p><p> </p><p>For what its worth accuracy seemed to get better as charge weights increased. At 28grs of 4895 under a 40gr V-Max I got very light primer flattening and 3878fps 30 feet from the muzzle. Barrel is a 10 twist Shilen. ES from charge weights 27.8 to 28 was only 15fps.</p></blockquote><p></p>
[QUOTE="Forester, post: 284080, member: 11102"] Is there a calculator out there that will give me an actual (predicted) muzzle velocity correction based on how far the Chrono was from the muzzle? I was doing some load development today with my new 204 ruger build but the hay was so high I had to sit the Chrono twice as far away as I usually do to get it on the right height. For what its worth accuracy seemed to get better as charge weights increased. At 28grs of 4895 under a 40gr V-Max I got very light primer flattening and 3878fps 30 feet from the muzzle. Barrel is a 10 twist Shilen. ES from charge weights 27.8 to 28 was only 15fps. [/QUOTE]
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Muzzle velocity correction?
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