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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hammer Bullets Pressure Testing Results
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<blockquote data-quote="Lou270" data-source="post: 2832588" data-attributes="member: 5352"><p>Coeffecient of friction goes down as velocity increases. So The bore friction is pretty small part of the deal. Also as friction goes down thus does pressure (ie force pushing on bullet) so that needs accounted. Think of it as shooting a small spit ball vs a tight fitting one. Among other things lead angles and rifling types affect pressures differently with different bullets. So you are right it is a system and difficult to model. Valid pressure testing data will set you free. May not match your gun exactly but will give you a good idea of how a bullet performs with respect to another in the same system and reduce the guess work and rationalizing</p><p></p><p>Lou</p></blockquote><p></p>
[QUOTE="Lou270, post: 2832588, member: 5352"] Coeffecient of friction goes down as velocity increases. So The bore friction is pretty small part of the deal. Also as friction goes down thus does pressure (ie force pushing on bullet) so that needs accounted. Think of it as shooting a small spit ball vs a tight fitting one. Among other things lead angles and rifling types affect pressures differently with different bullets. So you are right it is a system and difficult to model. Valid pressure testing data will set you free. May not match your gun exactly but will give you a good idea of how a bullet performs with respect to another in the same system and reduce the guess work and rationalizing Lou [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Hammer Bullets Pressure Testing Results
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