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Rifles, Reloading, Optics, Equipment
Reloading
How to determine a starting point on a wildcat that no one has done before?
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<blockquote data-quote="338hammer" data-source="post: 183874" data-attributes="member: 10182"><p><strong>How to determine a starting point on a wildcat that no one has done before</strong></p><p></p><p>Actually this has been done before in different ways with basically the same unhappy results. P.O. Ackley volume 1 page 374. Originally called the 6.5 Mashburn.</p><p> </p><p>Years ago I found a chronigraphy invaluable in wildcatting. In particular the smaller cartridges. I would take the data in the afore mentioned book,reduce loads shown by 10% and begin without scoping the gun. Load one cartridge with a base charge and increase at 1 grain increments and record velocities. Watch your primers and the chrony. AT a point your chrony will stop making advances and at a point you will actually go in reverse while your primers start cratoring. You have now reached the upper pressure level and have gone to far. Metal flowing out of the primer pin mark may or may not show at the point of velocity loss. That cratoring will begin and the amount of flow will increase in increments as powder is added until you peirce the primer or blow it out. The first sign of velocity loss is what the industry calls diminished returns.</p><p> </p><p>THE FIRST SIGN OF CRATORING IS A BIGlight bulb. STOP< DANGER WILL ROBINSON!!</p><p> </p><p>I have survived 30 years of wildcatting without incident or injury by paying attention to the above information.</p><p> </p><p>For what its worth</p><p> </p><p>338</p></blockquote><p></p>
[QUOTE="338hammer, post: 183874, member: 10182"] [b]How to determine a starting point on a wildcat that no one has done before[/b] Actually this has been done before in different ways with basically the same unhappy results. P.O. Ackley volume 1 page 374. Originally called the 6.5 Mashburn. Years ago I found a chronigraphy invaluable in wildcatting. In particular the smaller cartridges. I would take the data in the afore mentioned book,reduce loads shown by 10% and begin without scoping the gun. Load one cartridge with a base charge and increase at 1 grain increments and record velocities. Watch your primers and the chrony. AT a point your chrony will stop making advances and at a point you will actually go in reverse while your primers start cratoring. You have now reached the upper pressure level and have gone to far. Metal flowing out of the primer pin mark may or may not show at the point of velocity loss. That cratoring will begin and the amount of flow will increase in increments as powder is added until you peirce the primer or blow it out. The first sign of velocity loss is what the industry calls diminished returns. THE FIRST SIGN OF CRATORING IS A BIGlight bulb. STOP< DANGER WILL ROBINSON!! I have survived 30 years of wildcatting without incident or injury by paying attention to the above information. For what its worth 338 [/QUOTE]
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How to determine a starting point on a wildcat that no one has done before?
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