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Rifles, Reloading, Optics, Equipment
Reloading
Need help: .22-250 load development in minimum shots fired
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<blockquote data-quote="benchracer" data-source="post: 1898038" data-attributes="member: 22069"><p>Your rifle is almost certain to have a 14 twist barrel from the factory. If you are shooting the tipped version of the 55 Varmageddon, you are likely to have stability problems during load development (especially since you live near sea level). If you are shooting the flat based hollow point version, you should be OK, though still not an ideal match to your twist rate.</p><p></p><p>Potential component issues aside, OAL/bullet seating depth is something that deserves careful attention in the 22-250. Most factory 22-250 chambers have a LOT of freebore. My 22-250's have never shot particularly well at the book length of 2.350". I have had my best results around 2.430", but that will be dependent on your actual chamber dimensions.</p><p></p><p>As a first step, I recommend measuring the length to lands, with this bullet, in your rifle. From there, perform the Berger Seating Depth Test with a starting load. You will likely find that your bullet is too short to reach the rifling while still seated in the case neck. That is OK. You can modify the Berger test by working forward from book length, rather than backward from max distance to the rifling.</p><p></p><p>Once you have established preferred seating depth, the OCW load development method (as mentioned by others) is an efficient way to go. Here are specific instructions on how to do that: <a href="http://optimalchargeweight.embarqspace.com/" target="_blank">http://optimalchargeweight.embarqspace.com/</a></p><p></p><p>IF your chosen components work well together, this process will yield a serviceable load. If it does not, you may need to make some component changes.</p><p></p><p>Good luck!</p></blockquote><p></p>
[QUOTE="benchracer, post: 1898038, member: 22069"] Your rifle is almost certain to have a 14 twist barrel from the factory. If you are shooting the tipped version of the 55 Varmageddon, you are likely to have stability problems during load development (especially since you live near sea level). If you are shooting the flat based hollow point version, you should be OK, though still not an ideal match to your twist rate. Potential component issues aside, OAL/bullet seating depth is something that deserves careful attention in the 22-250. Most factory 22-250 chambers have a LOT of freebore. My 22-250's have never shot particularly well at the book length of 2.350". I have had my best results around 2.430", but that will be dependent on your actual chamber dimensions. As a first step, I recommend measuring the length to lands, with this bullet, in your rifle. From there, perform the Berger Seating Depth Test with a starting load. You will likely find that your bullet is too short to reach the rifling while still seated in the case neck. That is OK. You can modify the Berger test by working forward from book length, rather than backward from max distance to the rifling. Once you have established preferred seating depth, the OCW load development method (as mentioned by others) is an efficient way to go. Here are specific instructions on how to do that: [URL]http://optimalchargeweight.embarqspace.com/[/URL] IF your chosen components work well together, this process will yield a serviceable load. If it does not, you may need to make some component changes. Good luck! [/QUOTE]
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Need help: .22-250 load development in minimum shots fired
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