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Rifles, Reloading, Optics, Equipment
Reloading
Can a scope cause issues with only vertical stringing?
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<blockquote data-quote="MAD10" data-source="post: 1961329" data-attributes="member: 29370"><p>Diddo what Alex and L.Sherm have said. Another way to understand ES is you could have a ridculous ES say 100 fps and still shoot a one hole group at 100 but that same load wil make you cry at distance.</p><p></p><p>Take a look at a ballistics app and plug in different velocities at say 1000 yards for a comparison. A 30 or 40 ES is like a 2" difference in a lot of calibers and you almost can't hold that 2" at 1000 yards because your reticle thickness will block your view. I have watched guys hammer steel or rocks and were surprised when crono'd read 23, 25, 42 ES.</p><p></p><p>Here is what I would do in order to eliminate things.</p><p></p><p>1) Run your load over a chronograph- if your ES is respectable than something else is causing the vert dispersion.</p><p></p><p>2) Have another known good shooter that you know can drive a rifle shoot that load at distance and see if they have similar results.</p><p></p><p>3) Drop on another scope known to perform well. I once had a new scope on a rig that had too little internal travel and it would change POA POI at different times because it was max'd out - almost made me punch myself in the face thinking I could not drive my rifle.</p><p></p><p>I am sure you know most of what has been said - just make sure you only address only one thing at a time or you'll go down rabbit holes you don't have too. Keep us posted on your findings. Good luck</p><p></p><p>ps Comb Height can cause this too. An adj cheek piece can screw you up too. Once you zero and you are sure your eye alignment is spot on then make a witness mark on your stock so that when you drop your cheek piece to pull the bolt out for cleaning etc you can return to that same cheek piece height it will cause you to hit high or low - think shotgun stuff when you think about comb height</p></blockquote><p></p>
[QUOTE="MAD10, post: 1961329, member: 29370"] Diddo what Alex and L.Sherm have said. Another way to understand ES is you could have a ridculous ES say 100 fps and still shoot a one hole group at 100 but that same load wil make you cry at distance. Take a look at a ballistics app and plug in different velocities at say 1000 yards for a comparison. A 30 or 40 ES is like a 2” difference in a lot of calibers and you almost can’t hold that 2” at 1000 yards because your reticle thickness will block your view. I have watched guys hammer steel or rocks and were surprised when crono‘d read 23, 25, 42 ES. Here is what I would do in order to eliminate things. 1) Run your load over a chronograph- if your ES is respectable than something else is causing the vert dispersion. 2) Have another known good shooter that you know can drive a rifle shoot that load at distance and see if they have similar results. 3) Drop on another scope known to perform well. I once had a new scope on a rig that had too little internal travel and it would change POA POI at different times because it was max’d out - almost made me punch myself in the face thinking I could not drive my rifle. I am sure you know most of what has been said - just make sure you only address only one thing at a time or you’ll go down rabbit holes you don’t have too. Keep us posted on your findings. Good luck ps Comb Height can cause this too. An adj cheek piece can screw you up too. Once you zero and you are sure your eye alignment is spot on then make a witness mark on your stock so that when you drop your cheek piece to pull the bolt out for cleaning etc you can return to that same cheek piece height it will cause you to hit high or low - think shotgun stuff when you think about comb height [/QUOTE]
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Reloading
Can a scope cause issues with only vertical stringing?
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