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Long Range Hunting & Shooting
338-378 & Powders
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<blockquote data-quote="Joel Russo" data-source="post: 304433" data-attributes="member: 6152"><p>We need more information to help solve the problem. When there is a fluctuation in velocity, is it up or down? What is the ES between shots between different days? Are you using cheap digital scales or old balance beam? Are you using a lube in the neck that is causing a chemical reaction? How are you storing the "other" rounds that are varying in velocity? Are you cleaning the barrel between different shooting sessions?</p><p></p><p>Do you have any fouling at the end of the barrel? The 40" barrel is excessive for this case, and you may be experiencing "slow down". </p><p></p><p>Are you're chronographs in 100% working condition and are they at the same distance from the muzzle every time?</p><p></p><p>I doubt that the problem is with the powder, since you stated that you had the same problem with H-1000 in other guns.</p><p></p><p>My guess is that the problem lies somewhere in your scales, powder storage, chronograph or primers...</p></blockquote><p></p>
[QUOTE="Joel Russo, post: 304433, member: 6152"] We need more information to help solve the problem. When there is a fluctuation in velocity, is it up or down? What is the ES between shots between different days? Are you using cheap digital scales or old balance beam? Are you using a lube in the neck that is causing a chemical reaction? How are you storing the "other" rounds that are varying in velocity? Are you cleaning the barrel between different shooting sessions? Do you have any fouling at the end of the barrel? The 40" barrel is excessive for this case, and you may be experiencing "slow down". Are you're chronographs in 100% working condition and are they at the same distance from the muzzle every time? I doubt that the problem is with the powder, since you stated that you had the same problem with H-1000 in other guns. My guess is that the problem lies somewhere in your scales, powder storage, chronograph or primers... [/QUOTE]
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