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Rifles, Reloading, Optics, Equipment
Reloading
Newbie Load Development Question - How many rounds and how many grain increments?
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<blockquote data-quote="Bart B" data-source="post: 1143555" data-attributes="member: 5302"><p>Laws of physics and chronographing a given load.......</p><p></p><p>Rifle hand held against ones shoulder at a bench:</p><p>Largest velocity spread and standard deviations. Medium average fps for velocity. Several people shooting the same rifle and ammo can get a 100 fps difference in average fps numbers and different spread and standard deviations. </p><p></p><p>Rifle resting on bags fired in free recoil untouched by shooter:</p><p>1/3 to 1/4 the velocity spread and SD of hand held above. Lowest average fps, too. </p><p></p><p>Barreled action in a fixed mount so it doesn't recoil at all:</p><p>Highest average fps. Lowest spread and standard deviation 1/4 to 1/5 or less than hand held rifles. This is how most commercial and arsenal ammo's tested.</p><p></p><p>Newton's laws.......</p></blockquote><p></p>
[QUOTE="Bart B, post: 1143555, member: 5302"] Laws of physics and chronographing a given load....... Rifle hand held against ones shoulder at a bench: Largest velocity spread and standard deviations. Medium average fps for velocity. Several people shooting the same rifle and ammo can get a 100 fps difference in average fps numbers and different spread and standard deviations. Rifle resting on bags fired in free recoil untouched by shooter: 1/3 to 1/4 the velocity spread and SD of hand held above. Lowest average fps, too. Barreled action in a fixed mount so it doesn't recoil at all: Highest average fps. Lowest spread and standard deviation 1/4 to 1/5 or less than hand held rifles. This is how most commercial and arsenal ammo's tested. Newton's laws....... [/QUOTE]
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Newbie Load Development Question - How many rounds and how many grain increments?
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