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Rifles, Reloading, Optics, Equipment
Reloading
chronograph & load development?
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<blockquote data-quote="Varmint Hunter" data-source="post: 292201" data-attributes="member: 313"><p>1. Known velocity in your rifle - The books are a good guide but that can be off quite a bit and velocity will vary from rifle to rifle. If shooting longrange than it is VERY important to know your muzzle velocity, among other things.</p><p></p><p>2. Standard deviation (SD) - generally speaking, a load which displays a low standard deviation (preferably single digits) is a good sign for a consistent and potentially accurate load. However, loads with low SD are not always the most accurate. </p><p>A low SD is important when shooting at long range. Obviously if two bullets leave the muzzle at different velocities they will impact much farther apart when shooting at extended distances. Hopefully your initial muzzle velocities are as close as possible to each other for consistent bullet drop.</p><p></p><p>I'm sure there are other uses for chronograph data but these two issues are what interest me.</p></blockquote><p></p>
[QUOTE="Varmint Hunter, post: 292201, member: 313"] 1. Known velocity in your rifle - The books are a good guide but that can be off quite a bit and velocity will vary from rifle to rifle. If shooting longrange than it is VERY important to know your muzzle velocity, among other things. 2. Standard deviation (SD) - generally speaking, a load which displays a low standard deviation (preferably single digits) is a good sign for a consistent and potentially accurate load. However, loads with low SD are not always the most accurate. A low SD is important when shooting at long range. Obviously if two bullets leave the muzzle at different velocities they will impact much farther apart when shooting at extended distances. Hopefully your initial muzzle velocities are as close as possible to each other for consistent bullet drop. I'm sure there are other uses for chronograph data but these two issues are what interest me. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
chronograph & load development?
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