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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
My Brain hurts....
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<blockquote data-quote="SBruce" data-source="post: 442386" data-attributes="member: 21068"><p>Vertical stringing has different meanings to different types of shooters. What I mean is: A competetive benchrest shooter would probably call a 1/3 or 1/2 moa group that was mostly vertical.........vertical stringing. A long range hunter would probably call that same 1/3 or 1/2 moa group.............good to go, because 1/2 minute or less is plenty good enough for most long range hunting, especially on big game. </p><p> </p><p>Guys that are trying to hit very small targets ie prarie dogs or such at distances beyond 600 yds require better than 1/2 moa to make consistant hits.</p><p> </p><p>You can get an idea of how much vertical you'd see in long range groups by chronographing the loads that you're shooting at 100 or 200 yds. If there is a large amount of "extreme spread", the groups will have alot of vertical dispersion at long range. </p><p> </p><p>Throat Gauging; I recommend the RCBS Precision Micrometer. They make one for most factory cartridges, they are not expensive, they will help you gauge your throat and set up your loading dies, they will give you an idea of the headspace in your gun too. Very good little tool, I've been using them for around 15 years or so on my factory guns.</p><p> </p><p>I start my load development (when possible) by seating the bullets .000" to .010" back from engaging the rifleing (using the Prec Mic to get this info).</p><p>I do not seat bullets "jammed" into the rifleing. I did once upon a time, and ended up leaving a bullet in the throat when I unloaded the gun and ejected the case. Left 36 grains of H380 powder in every crack and crevice in my rifle action.....bolt wouldn't even close after that........ruined my day and took alot of time to get it cleaned out!!!! </p><p> </p><p>If I change my seating depth, I only have to move it back out farther. Don't usually have to reduce powder charge because of moving bullets back, but sometimes do when moving bullets out. Another reason for starting close to the rifleing and working up with powder charges.</p><p> </p><p>Good luck to ya!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="SBruce, post: 442386, member: 21068"] Vertical stringing has different meanings to different types of shooters. What I mean is: A competetive benchrest shooter would probably call a 1/3 or 1/2 moa group that was mostly vertical.........vertical stringing. A long range hunter would probably call that same 1/3 or 1/2 moa group.............good to go, because 1/2 minute or less is plenty good enough for most long range hunting, especially on big game. Guys that are trying to hit very small targets ie prarie dogs or such at distances beyond 600 yds require better than 1/2 moa to make consistant hits. You can get an idea of how much vertical you'd see in long range groups by chronographing the loads that you're shooting at 100 or 200 yds. If there is a large amount of "extreme spread", the groups will have alot of vertical dispersion at long range. Throat Gauging; I recommend the RCBS Precision Micrometer. They make one for most factory cartridges, they are not expensive, they will help you gauge your throat and set up your loading dies, they will give you an idea of the headspace in your gun too. Very good little tool, I've been using them for around 15 years or so on my factory guns. I start my load development (when possible) by seating the bullets .000" to .010" back from engaging the rifleing (using the Prec Mic to get this info). I do not seat bullets "jammed" into the rifleing. I did once upon a time, and ended up leaving a bullet in the throat when I unloaded the gun and ejected the case. Left 36 grains of H380 powder in every crack and crevice in my rifle action.....bolt wouldn't even close after that........ruined my day and took alot of time to get it cleaned out!!!! If I change my seating depth, I only have to move it back out farther. Don't usually have to reduce powder charge because of moving bullets back, but sometimes do when moving bullets out. Another reason for starting close to the rifleing and working up with powder charges. Good luck to ya!:) [/QUOTE]
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