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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hammer Bullets Pressure Testing Results
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<blockquote data-quote="Veteran" data-source="post: 2832586" data-attributes="member: 118038"><p>Physics is physics is physics.</p><p></p><p>If we can send men to the moon and model that, we can model shooting a Hammer Bullet and get correct outputs w a little work and history matching.</p><p></p><p>The real issues here have been well defined by this thread.</p><p></p><p>1) Starting pressures in the chamber are not the same as for standard construction bullets. Therefore it will be appropriate to lower them to get a history match with chrono mv.</p><p></p><p>2) Friction loss and loss of pressure in travel down the bbl </p><p>and the length of the bbl will be important to get right in the model, because of the difference in x section bearing of the bullet w lands and rifling in the hammer bullets.</p><p></p><p>So, some x section vs. length parameters and some frictional adjustment factors have to be </p><p>modeled and history matched in some experimental bbls or in some detailed physics models to derive the right friction loss per inch of bbl for these specific bullets.</p><p></p><p>If you have these parameters correct in QL or GRT, I believe one can history match the model to actual chrono data pretty accurately.</p></blockquote><p></p>
[QUOTE="Veteran, post: 2832586, member: 118038"] Physics is physics is physics. If we can send men to the moon and model that, we can model shooting a Hammer Bullet and get correct outputs w a little work and history matching. The real issues here have been well defined by this thread. 1) Starting pressures in the chamber are not the same as for standard construction bullets. Therefore it will be appropriate to lower them to get a history match with chrono mv. 2) Friction loss and loss of pressure in travel down the bbl and the length of the bbl will be important to get right in the model, because of the difference in x section bearing of the bullet w lands and rifling in the hammer bullets. So, some x section vs. length parameters and some frictional adjustment factors have to be modeled and history matched in some experimental bbls or in some detailed physics models to derive the right friction loss per inch of bbl for these specific bullets. If you have these parameters correct in QL or GRT, I believe one can history match the model to actual chrono data pretty accurately. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Hammer Bullets Pressure Testing Results
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