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Rifles, Reloading, Optics, Equipment
Reloading
Dramatic drop in velocity with exact same components - strange! Ever seen this??
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<blockquote data-quote="MagnumManiac" data-source="post: 2293723" data-attributes="member: 10755"><p>I had a similar instance where 1 grain more powder gave 100+fps increase…..but the Pressure Trace did not show an equivalent rise in pressure. Only explanation was the chronograph, which was my Pact at the time.</p><p>I have seen loss in velocity that progressed as a #lot of powder (IMR 4320) aged. It was several years old when I got it, all up was 10 metal cans, none of which had been opened, and as the years progressed, the powder lost intensity, even adding more powder did not regain the initial velocity I was getting with it in my 22-250.</p><p>I used it all up and said to myself that was a noteworthy exercise. 300fps over about 7 years was lost if I used the same exact load and components.</p><p></p><p>I think your chrony may be faulty.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2293723, member: 10755"] I had a similar instance where 1 grain more powder gave 100+fps increase…..but the Pressure Trace did not show an equivalent rise in pressure. Only explanation was the chronograph, which was my Pact at the time. I have seen loss in velocity that progressed as a #lot of powder (IMR 4320) aged. It was several years old when I got it, all up was 10 metal cans, none of which had been opened, and as the years progressed, the powder lost intensity, even adding more powder did not regain the initial velocity I was getting with it in my 22-250. I used it all up and said to myself that was a noteworthy exercise. 300fps over about 7 years was lost if I used the same exact load and components. I think your chrony may be faulty. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Dramatic drop in velocity with exact same components - strange! Ever seen this??
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