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Rifles, Reloading, Optics, Equipment
Reloading
Very first ladder test, take a look.
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<blockquote data-quote="green 788" data-source="post: 94322" data-attributes="member: 3781"><p>grit, that's pretty much it. Both tests are essentially seeking the same data. But the OCW method refines that data to a level that leaves a lot less doubt than a ladder test.</p><p></p><p>Now, if you were to shoot <em>three</em> ladder tests all in succession, that would make the results more cogent. If the same cluster or clusters formed in each string, there would be little doubt as to the location of the individual accuracy node(s). The problem here is that most folks use graduations which are too small, and end up shooting twenty shots in one string. That may be fine on some rifles, but on others--especially sporter weight barrels--heat issues will often spoil the results.</p><p></p><p>Roy, there are instructions at my webpage (and the info there is free to the world, I don't profit from this--I don't even have advertising on my site) which describe how to choose the powder charges to test. If you're using a Hodgdon powder, get hold of their data (actually, now that I think of it, Hodgdon's data is free at <a href="http://www.hodgdon.com" target="_blank">www.hodgdon.com</a> )... Use Hodgdon's max load and back off 7 percent for a fouler/sighter, then move up <em>about</em> 1 percent and fire another (6 percent under max) then move up again and fire one more shot at 5 percent under max, then begin at 4 percent under max shooting three each in round robin fashion at each of 5 or 6 different target squares. Don't be tempted to shoot too many graduations. .2 grain increments are way too small for the .338WM. Use at least .5 grain increments. You should even be able to see good results with .6 grain increments. If the charge weight increments are too small, the barrel may heat and/or foul too soon for you to be able to see where the accuracy nodes actually are.</p><p></p><p>If you're using another brand of powder, such as Alliant or IMR (now owned by Hodgdon), do much the same thing as mentioned above. Go with the powder maker's max and back down about 7 percent and shoot three graduated sighter/foulers, then begin the OCW test. Powder companies tend to have the most useful load data, I've noticed. Bullet makers aren't so great, although Nosler's "most accurate powder tested" is generally a good place to start. </p><p></p><p>Best of luck,</p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="green 788, post: 94322, member: 3781"] grit, that's pretty much it. Both tests are essentially seeking the same data. But the OCW method refines that data to a level that leaves a lot less doubt than a ladder test. Now, if you were to shoot [i]three[/i] ladder tests all in succession, that would make the results more cogent. If the same cluster or clusters formed in each string, there would be little doubt as to the location of the individual accuracy node(s). The problem here is that most folks use graduations which are too small, and end up shooting twenty shots in one string. That may be fine on some rifles, but on others--especially sporter weight barrels--heat issues will often spoil the results. Roy, there are instructions at my webpage (and the info there is free to the world, I don't profit from this--I don't even have advertising on my site) which describe how to choose the powder charges to test. If you're using a Hodgdon powder, get hold of their data (actually, now that I think of it, Hodgdon's data is free at [url="http://www.hodgdon.com"]www.hodgdon.com[/url] )... Use Hodgdon's max load and back off 7 percent for a fouler/sighter, then move up [i]about[/i] 1 percent and fire another (6 percent under max) then move up again and fire one more shot at 5 percent under max, then begin at 4 percent under max shooting three each in round robin fashion at each of 5 or 6 different target squares. Don't be tempted to shoot too many graduations. .2 grain increments are way too small for the .338WM. Use at least .5 grain increments. You should even be able to see good results with .6 grain increments. If the charge weight increments are too small, the barrel may heat and/or foul too soon for you to be able to see where the accuracy nodes actually are. If you're using another brand of powder, such as Alliant or IMR (now owned by Hodgdon), do much the same thing as mentioned above. Go with the powder maker's max and back down about 7 percent and shoot three graduated sighter/foulers, then begin the OCW test. Powder companies tend to have the most useful load data, I've noticed. Bullet makers aren't so great, although Nosler's "most accurate powder tested" is generally a good place to start. Best of luck, Dan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Very first ladder test, take a look.
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