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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
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<blockquote data-quote="cabelasken" data-source="post: 2234259" data-attributes="member: 117774"><p>Without everybody using the same chronograph, it's hard to compare data. But, when you get 200 FPS above what the book says you should I would question the safety of the recipe and/or the accuracy of the chronograph. I've seen custom barrels and chambers gain as much as 75 FPS in my loads over published velocities, but I'm not completely sure my Chronograph is 100 percent accurate also. It does tell me which powders produce the highest velocities with specific weight bullets for my calibers. I do know that my 284 win loads from a 23" barrel match or exceed 7MM remington mag velocities (24" barrel) (factory loads) for bullets 150 Gr and less because we chrony's them on the same day side by side.</p></blockquote><p></p>
[QUOTE="cabelasken, post: 2234259, member: 117774"] Without everybody using the same chronograph, it's hard to compare data. But, when you get 200 FPS above what the book says you should I would question the safety of the recipe and/or the accuracy of the chronograph. I've seen custom barrels and chambers gain as much as 75 FPS in my loads over published velocities, but I'm not completely sure my Chronograph is 100 percent accurate also. It does tell me which powders produce the highest velocities with specific weight bullets for my calibers. I do know that my 284 win loads from a 23" barrel match or exceed 7MM remington mag velocities (24" barrel) (factory loads) for bullets 150 Gr and less because we chrony's them on the same day side by side. [/QUOTE]
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