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Rifles, Reloading, Optics, Equipment
Reloading
Help! Extreme spread and standard deviation loads
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<blockquote data-quote="Bart B" data-source="post: 1106148" data-attributes="member: 5302"><p>People that have shot their rifles chronographing loads the conventional way (resting on something atop a bench when held against their shoulder) then compared the same system shot in free recoil learned the following.</p><p></p><p>Average muzzle velocity is less; more recoil while the bullet goes through the barrel. Newton's law.</p><p></p><p>Muzzle velocity standard deviation is 1/4 to 1/3 as much. More consistent resistance to recoil. Newton's law all over again.</p><p></p><p>Shooting slung up in prone resting the rifle on bags typically produces smaller groups than the conventional way as well as lower standard deviations. At least that's what I and many others have observed.</p><p></p><p>Those tiny benchrest groups are shot typically in free recoil untouched by humans except for a finger on a few-ounce trigger. Only after the bullet's left does the rifle finally stop moving as it's against ones shoulder.</p><p></p><p>Us humans don't hold centerfire rifles exactly the same from shot to shot. Gets worse with more recoil.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1106148, member: 5302"] People that have shot their rifles chronographing loads the conventional way (resting on something atop a bench when held against their shoulder) then compared the same system shot in free recoil learned the following. Average muzzle velocity is less; more recoil while the bullet goes through the barrel. Newton's law. Muzzle velocity standard deviation is 1/4 to 1/3 as much. More consistent resistance to recoil. Newton's law all over again. Shooting slung up in prone resting the rifle on bags typically produces smaller groups than the conventional way as well as lower standard deviations. At least that's what I and many others have observed. Those tiny benchrest groups are shot typically in free recoil untouched by humans except for a finger on a few-ounce trigger. Only after the bullet's left does the rifle finally stop moving as it's against ones shoulder. Us humans don't hold centerfire rifles exactly the same from shot to shot. Gets worse with more recoil. [/QUOTE]
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Reloading
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