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Rifles, Reloading, Optics, Equipment
Reloading
my loads do not approach reloading book velocities?
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<blockquote data-quote="Engineering101" data-source="post: 926757" data-attributes="member: 63138"><p><span style="font-size: 15px">skeeterboud</span></p><p> </p><p><span style="font-size: 15px">The comments about chamber size, powder burn rate, etc. are right on. However there is one thing not mentioned that will help a little. You won't get all of the velocity accounted for but some of it if you align your chrono with a laser bore sighter. This is because any misalignment results in reduced velocity readings. For example, ten degrees of misalignment in both pitch and yaw will make 3,000 fps true velocity read near 2,900 fps. (That is why the magnetospeeds are nice because they are automatically aligned with the bore.)</span></p><p> </p><p><span style="font-size: 15px">Anyway to do this with a normal chrono, aim the rifle at the target, put the laser bore sighter in the bore and then put marked (with a grid) see through plastic targets on each chrono sky screens to catch the laser. When the laser hits the same spot on the plastic targets on both sky screens, it is perfectly aligned.</span></p></blockquote><p></p>
[QUOTE="Engineering101, post: 926757, member: 63138"] [SIZE=4]skeeterboud[/SIZE] [SIZE=4][/SIZE] [SIZE=4]The comments about chamber size, powder burn rate, etc. are right on. However there is one thing not mentioned that will help a little. You won't get all of the velocity accounted for but some of it if you align your chrono with a laser bore sighter. This is because any misalignment results in reduced velocity readings. For example, ten degrees of misalignment in both pitch and yaw will make 3,000 fps true velocity read near 2,900 fps. (That is why the magnetospeeds are nice because they are automatically aligned with the bore.)[/SIZE] [SIZE=4][/SIZE] [SIZE=4]Anyway to do this with a normal chrono, aim the rifle at the target, put the laser bore sighter in the bore and then put marked (with a grid) see through plastic targets on each chrono sky screens to catch the laser. When the laser hits the same spot on the plastic targets on both sky screens, it is perfectly aligned.[/SIZE] [SIZE=4][/SIZE] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
my loads do not approach reloading book velocities?
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