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Rifles, Reloading, Optics, Equipment
Reloading
Using chronograph data to determine the best load????
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<blockquote data-quote="green 788" data-source="post: 93009" data-attributes="member: 3781"><p>We've headed off in a couple or three different areas here, but it's shaping up to be an interesting discussion.</p><p></p><p>BH, I don't recall us discussing the OCW load development method, but that's my fault. I've got a bad memory sometimes.</p><p></p><p>You seem like you do find credence in the ladder method (Audette method), which is why I'm puzzled that you don't believe the OCW method is useful. In truth, the OCW method is a modified Audette method, and statistically much more meaningful than any number of ladder tests one might want to shoot. The OCW method allows for the variations of warming and fouling barrels, changing conditions, and even a tiring shooter--as it seeks to spread the error factor evenly across all of the tested charge weights.</p><p></p><p>There simply are not that many true accuracy nodes for any given powder and bullet combo. I'd say it's extremely rare to find more than two <em>true accuracy nodes</em> within reasonable pressure levels (starting and max loads). That isn't to say that you won't find some powder charges which shoot very well--so long as they are carefully weighed, and poured into perfectly prepared brass with bullets seated <em>just so</em>--but those are not true accuracy nodes.</p><p></p><p>Not to impugn you personally--as I'm sure you're up to speed on many aspects of shooting and handloading--but I have found an astonishing amount of ignorance in BR circles as to what is and is not important. Some BR guys buck the system, such as Richard Schatz who doesn't neck turn or uniform primer pockets or shoot a twenty pound rifle--but still manages to have the 6-target NBRSA 1000-yard Light Gun World Record (shooting a 6mm Dasher). Or Tim Lambert, who put together a Savage actioned 7mm WSM and, with less than a grand invested in the whole rig, fired a world record 1 mile group. Such guys are not common. Most folks in the craft continue to suck the pablum of whatever everyone else tells them will and won't work--which is why you see so much conformity.</p><p></p><p>While I recognize the two guys above as the winners that they indeed are, it is still not prudent to assume that just because a guy is a good trigger man that he necessarily knows all there is to know about load development. There are excellent race car drivers who will hold up a bottle of STP oil treatment and smile for the camera--all the while knowing very little about engine lubrication.</p><p></p><p>One last thing. OCW load recipes don't have to be limited to 1/2 MOA. One can alter the seating depth of the bullet and/or try different primers to tune the group even smaller. So I'm not sure where the notion that OCW load recipes are good for 1/2 MOA and no more comes from. That's just not true.</p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="green 788, post: 93009, member: 3781"] We've headed off in a couple or three different areas here, but it's shaping up to be an interesting discussion. BH, I don't recall us discussing the OCW load development method, but that's my fault. I've got a bad memory sometimes. You seem like you do find credence in the ladder method (Audette method), which is why I'm puzzled that you don't believe the OCW method is useful. In truth, the OCW method is a modified Audette method, and statistically much more meaningful than any number of ladder tests one might want to shoot. The OCW method allows for the variations of warming and fouling barrels, changing conditions, and even a tiring shooter--as it seeks to spread the error factor evenly across all of the tested charge weights. There simply are not that many true accuracy nodes for any given powder and bullet combo. I'd say it's extremely rare to find more than two [i]true accuracy nodes[/i] within reasonable pressure levels (starting and max loads). That isn't to say that you won't find some powder charges which shoot very well--so long as they are carefully weighed, and poured into perfectly prepared brass with bullets seated [i]just so[/i]--but those are not true accuracy nodes. Not to impugn you personally--as I'm sure you're up to speed on many aspects of shooting and handloading--but I have found an astonishing amount of ignorance in BR circles as to what is and is not important. Some BR guys buck the system, such as Richard Schatz who doesn't neck turn or uniform primer pockets or shoot a twenty pound rifle--but still manages to have the 6-target NBRSA 1000-yard Light Gun World Record (shooting a 6mm Dasher). Or Tim Lambert, who put together a Savage actioned 7mm WSM and, with less than a grand invested in the whole rig, fired a world record 1 mile group. Such guys are not common. Most folks in the craft continue to suck the pablum of whatever everyone else tells them will and won't work--which is why you see so much conformity. While I recognize the two guys above as the winners that they indeed are, it is still not prudent to assume that just because a guy is a good trigger man that he necessarily knows all there is to know about load development. There are excellent race car drivers who will hold up a bottle of STP oil treatment and smile for the camera--all the while knowing very little about engine lubrication. One last thing. OCW load recipes don't have to be limited to 1/2 MOA. One can alter the seating depth of the bullet and/or try different primers to tune the group even smaller. So I'm not sure where the notion that OCW load recipes are good for 1/2 MOA and no more comes from. That's just not true. Dan [/QUOTE]
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Using chronograph data to determine the best load????
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