Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Way in or way out ?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="green 788" data-source="post: 98404" data-attributes="member: 3781"><p>BH,</p><p></p><p>Dude I'm sorry... There simply will not be <strong>four</strong> <em>true</em> accuracy nodes in a ladder test. Generally, there will be two, and if you're dipping really low with the powder charge you might find three.</p><p></p><p>If you're finding <strong>four</strong> nodes at least one of them is going to be a false node.</p><p></p><p>If you're finding <strong>three</strong> nodes, one of them is going to be at way under useful velocity and load density--or else way over max.</p><p></p><p>By following the OCW instructions at my site, a handloader backs down 7 to 10 percent under max and fires three test charges, graduated in 2% increments. Then the OCW test moves up in 1% increments until you reach the published maximum.</p><p></p><p>By working near the maximum, and identifying the <em>highest</em> accuracy node, better load density is realized, and generally speaking better accuracy as well. Another plus is the bullet will have its highest velocity in this area, so your 22-250 isn't acting like a .223, which would be the case at one of the early "four" accuracy nodes you mention.</p><p></p><p>You claim that you would toss out a tight group if the chronograph didn't show good numbers. You should not do this. Chronographs can and do make errors. ES can almost always be improved with different seating depths, or even primer swaps. If you're showing a tight group in a ladder at 300 yards I wouldn't let some possibly bogus chrony numbers put me off the trail.</p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="green 788, post: 98404, member: 3781"] BH, Dude I'm sorry... There simply will not be [b]four[/b] [i]true[/i] accuracy nodes in a ladder test. Generally, there will be two, and if you're dipping really low with the powder charge you might find three. If you're finding [b]four[/b] nodes at least one of them is going to be a false node. If you're finding [b]three[/b] nodes, one of them is going to be at way under useful velocity and load density--or else way over max. By following the OCW instructions at my site, a handloader backs down 7 to 10 percent under max and fires three test charges, graduated in 2% increments. Then the OCW test moves up in 1% increments until you reach the published maximum. By working near the maximum, and identifying the [i]highest[/i] accuracy node, better load density is realized, and generally speaking better accuracy as well. Another plus is the bullet will have its highest velocity in this area, so your 22-250 isn't acting like a .223, which would be the case at one of the early "four" accuracy nodes you mention. You claim that you would toss out a tight group if the chronograph didn't show good numbers. You should not do this. Chronographs can and do make errors. ES can almost always be improved with different seating depths, or even primer swaps. If you're showing a tight group in a ladder at 300 yards I wouldn't let some possibly bogus chrony numbers put me off the trail. Dan [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Way in or way out ?
Top