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The Basics, Starting Out
Ladder testing
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<blockquote data-quote="Highdesertmike" data-source="post: 1564082" data-attributes="member: 59540"><p>OK, got it. Yes. As you perform this testing and find the node, everything tightens up. The node usually presents itself in a 1 to 2 grain window. So in essence, the barrel "likes" a charge weight between a certain range. IE: you find that a charge starting at 43.5 grains and 44.8 grains gives you both low ES/SD AND little vertical change, then that is your window. So if we settle on the middle 44.1 /44.2 grains as our load, we could be 1/2 grain on either side of that and still have the accuracy we desire.</p><p>It only stands to reason that everything being equal, the faster bullet is going to have less time to be affected by gravity prior to target impact, and should hit higher than the slower one.</p><p>I'm not a Mathematician nor a Ballistician. This is probably beginning to get over my head. This is how I understand it and I know it works for me. I'm not qualified to argue another person's method as wrong or right. The books produced by Brian Litz (Berger Bullets Ballistician) get into all this in depth and may be a good resource for further explanation.</p><p>Great conversation all involved. Thanks</p></blockquote><p></p>
[QUOTE="Highdesertmike, post: 1564082, member: 59540"] OK, got it. Yes. As you perform this testing and find the node, everything tightens up. The node usually presents itself in a 1 to 2 grain window. So in essence, the barrel "likes" a charge weight between a certain range. IE: you find that a charge starting at 43.5 grains and 44.8 grains gives you both low ES/SD AND little vertical change, then that is your window. So if we settle on the middle 44.1 /44.2 grains as our load, we could be 1/2 grain on either side of that and still have the accuracy we desire. It only stands to reason that everything being equal, the faster bullet is going to have less time to be affected by gravity prior to target impact, and should hit higher than the slower one. I'm not a Mathematician nor a Ballistician. This is probably beginning to get over my head. This is how I understand it and I know it works for me. I'm not qualified to argue another person's method as wrong or right. The books produced by Brian Litz (Berger Bullets Ballistician) get into all this in depth and may be a good resource for further explanation. Great conversation all involved. Thanks [/QUOTE]
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