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Rifles, Reloading, Optics, Equipment
Reloading
What causes horizontal spread
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<blockquote data-quote="MagnumManiac" data-source="post: 1110661" data-attributes="member: 10755"><p>Now I understand what horizontal spread you are talking about.</p><p>This is normal, as the barrel oscillates with different charge weights, the POI will change, it can change in a 360º arc, so any direction from POA is possible.</p><p>I thought you meant with a single powder charge.</p><p>Ladder tests are to determine the charge weights that group together, not where they print from POA, as the POA is not what you're testing for.</p><p>When shooting groups, you do not worry about POA to POI differences, only that you are consistently aiming at the same point and how tight the groups are.</p><p>I have always found a front rest with sand bags to be more forgiving than a bi-pod, sometimes recoil bounce will deflect POI, which is not always noticed until a switch to another rest set up is done with the same parameters.</p><p>Even cheek weld differences can cause POI deflections.</p><p></p><p>Hope this helps.</p><p></p><p>Cheers.</p><p>lightbulb</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1110661, member: 10755"] Now I understand what horizontal spread you are talking about. This is normal, as the barrel oscillates with different charge weights, the POI will change, it can change in a 360º arc, so any direction from POA is possible. I thought you meant with a single powder charge. Ladder tests are to determine the charge weights that group together, not where they print from POA, as the POA is not what you're testing for. When shooting groups, you do not worry about POA to POI differences, only that you are consistently aiming at the same point and how tight the groups are. I have always found a front rest with sand bags to be more forgiving than a bi-pod, sometimes recoil bounce will deflect POI, which is not always noticed until a switch to another rest set up is done with the same parameters. Even cheek weld differences can cause POI deflections. Hope this helps. Cheers. lightbulb [/QUOTE]
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What causes horizontal spread
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