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Hunting
Long Range Hunting & Shooting
Why does velicity increase with # of shots?
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<blockquote data-quote="Greyfox" data-source="post: 1240328" data-attributes="member: 10291"><p>Other than a new barrel for the first 100 rounds, I have not experienced increasing velocities with my rifles. A 50-100 FPS increase is very high and would be a killer for any long range work. I do believe that the combination of a hot chamber with a case that uses a powder charge that does not <strong>utilize all the case capacity</strong> can see a pressure/velocity spike, especially if the case sits in the hot chamber for any length of time. Also, when using the Magnetospeed I have found velocity can change due to the bayonet positioned too low relative to the barrel, small changes in the bayonet sliding on the barrel due to recoil, or carbon build up on the surface of the magnet. The change is usually progressive when this occurs. I'm not saying these factors are the reason for the OP's increasing velocity but it's something to keep an eye on when velocities are out of control.IMO.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1240328, member: 10291"] Other than a new barrel for the first 100 rounds, I have not experienced increasing velocities with my rifles. A 50-100 FPS increase is very high and would be a killer for any long range work. I do believe that the combination of a hot chamber with a case that uses a powder charge that does not [B]utilize all the case capacity[/B] can see a pressure/velocity spike, especially if the case sits in the hot chamber for any length of time. Also, when using the Magnetospeed I have found velocity can change due to the bayonet positioned too low relative to the barrel, small changes in the bayonet sliding on the barrel due to recoil, or carbon build up on the surface of the magnet. The change is usually progressive when this occurs. I'm not saying these factors are the reason for the OP's increasing velocity but it's something to keep an eye on when velocities are out of control.IMO. [/QUOTE]
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Why does velicity increase with # of shots?
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