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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity=Pressure?
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<blockquote data-quote="boomtube" data-source="post: 470676" data-attributes="member: 9215"><p>Well Chief, we can't get velocity without pressure but how that pressure occurs is the real controlling factor. We can get 60k psi in a .300 Win Mag with both Bullseye and H-4831 but only with the slower buring powder can we otain much velocity. Velocity comes from the burn rate almost as much as the peak pressure, meaning the longer we push the bullet the more it will accelerate.</p><p> </p><p>You don't mention the cartridge that's 200 fps slow for you, rifle or pistol, but if you mean a rifle load is that much slower than a book projection it's NOT an uncommon thing. Nor, as a practical matter, does such a loss actually mean beans in the woods and field; you can see that by checking most any velocity:trajectory chart. The difference in 200 fps is ususlly equal to being maybe 30 yards further from the game and that really doesn't make a lot of difference - if it does, get 30 yards closer! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p> </p><p>Good job swabby, thank you.</p></blockquote><p></p>
[QUOTE="boomtube, post: 470676, member: 9215"] Well Chief, we can't get velocity without pressure but how that pressure occurs is the real controlling factor. We can get 60k psi in a .300 Win Mag with both Bullseye and H-4831 but only with the slower buring powder can we otain much velocity. Velocity comes from the burn rate almost as much as the peak pressure, meaning the longer we push the bullet the more it will accelerate. You don't mention the cartridge that's 200 fps slow for you, rifle or pistol, but if you mean a rifle load is that much slower than a book projection it's NOT an uncommon thing. Nor, as a practical matter, does such a loss actually mean beans in the woods and field; you can see that by checking most any velocity:trajectory chart. The difference in 200 fps is ususlly equal to being maybe 30 yards further from the game and that really doesn't make a lot of difference - if it does, get 30 yards closer! ;) Good job swabby, thank you. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Velocity=Pressure?
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