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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Savage Experts - Your assistance please
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<blockquote data-quote="bootsking" data-source="post: 922069" data-attributes="member: 4596"><p>"Then I shot groups while bumping up powder charges in .5 grain steps, then took what seamed like the best charge weights and started playing with seating depth. Again everything was pretty consistent across the board. I threw all charges on my Harrell then weighted them, throwing anything that wasn't spot on for weight back in the can so my powder is both spot on for weight and volume. I didn't ask my friend what his methods were."</p><p></p><p>You may want to Google "OCW" and "Ladder Test"; shooting and judging group size with different charges is not the principle involved to find the nodes. Also changing the charge by 0.5 on a 223 is quite a large increment, and 0.2-0.3 would be much better. The objective of these methods is to map the point of impact (POI) as the charge is increased, and find the charge where the vertical POI is affected the least (or not at all). It is only necessary to load one bullet/charge so you can cover a wide charge range with just a few loads. These methods are well proven, and to take it one step further the nodes correlate well with the shock wave time which can also be calculated; Google "Chris Long OBT".</p></blockquote><p></p>
[QUOTE="bootsking, post: 922069, member: 4596"] "Then I shot groups while bumping up powder charges in .5 grain steps, then took what seamed like the best charge weights and started playing with seating depth. Again everything was pretty consistent across the board. I threw all charges on my Harrell then weighted them, throwing anything that wasn't spot on for weight back in the can so my powder is both spot on for weight and volume. I didn't ask my friend what his methods were." You may want to Google "OCW" and "Ladder Test"; shooting and judging group size with different charges is not the principle involved to find the nodes. Also changing the charge by 0.5 on a 223 is quite a large increment, and 0.2-0.3 would be much better. The objective of these methods is to map the point of impact (POI) as the charge is increased, and find the charge where the vertical POI is affected the least (or not at all). It is only necessary to load one bullet/charge so you can cover a wide charge range with just a few loads. These methods are well proven, and to take it one step further the nodes correlate well with the shock wave time which can also be calculated; Google "Chris Long OBT". [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Savage Experts - Your assistance please
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