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Rifles, Reloading, Optics, Equipment
Reloading
Load development ladder test
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<blockquote data-quote="CPorter" data-source="post: 86018" data-attributes="member: 4952"><p>zingdingo,</p><p></p><p> You are right, the point of the ladder test is to reduce the number of rounds necessary. Unfortunately not all guns will throw a nice vertical string in a ladder test. These guns require more rounds per load to get anything from the test.</p><p></p><p>Optimal barrel timing is based on traveling shock waves in the barrel. In the cartoons when a gun is fired the barrel balloons out and the balloon travels down the barrel to the muzzle and spits out a bullet. In reality the balloon isn't that bad but it does travel down the barrel and back 3 or more times before the bullet leaves the muzzle. It's been shown that when the traveling wave reaches the muzzle the bore opens up slightly and this degrades accuracy. Best accuracy is when the bore is at it's minimum diameter. Optimal barrel timing takes this into account. So far in my experiments ladder testing has shown two or three nodes and the optimum barrel timing predicts them fairly close. </p><p></p><p></p><p></p><p><a href="http://www.speakeasy.org/~cdlong/shock%20wave%20theory%20summary%20explanation.htm" target="_blank">Optimal barrel timing</a></p></blockquote><p></p>
[QUOTE="CPorter, post: 86018, member: 4952"] zingdingo, You are right, the point of the ladder test is to reduce the number of rounds necessary. Unfortunately not all guns will throw a nice vertical string in a ladder test. These guns require more rounds per load to get anything from the test. Optimal barrel timing is based on traveling shock waves in the barrel. In the cartoons when a gun is fired the barrel balloons out and the balloon travels down the barrel to the muzzle and spits out a bullet. In reality the balloon isn't that bad but it does travel down the barrel and back 3 or more times before the bullet leaves the muzzle. It's been shown that when the traveling wave reaches the muzzle the bore opens up slightly and this degrades accuracy. Best accuracy is when the bore is at it's minimum diameter. Optimal barrel timing takes this into account. So far in my experiments ladder testing has shown two or three nodes and the optimum barrel timing predicts them fairly close. [url="http://www.speakeasy.org/~cdlong/shock%20wave%20theory%20summary%20explanation.htm"]Optimal barrel timing[/url] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Load development ladder test
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