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Rifles, Reloading, Optics, Equipment
Reloading
Why I Crimp
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<blockquote data-quote="J E Custom" data-source="post: 2012024" data-attributes="member: 2736"><p>For many years and many reasons, people have been crimping. I still crimp some cartridges and don't crimp others. Most if not all dangerous game rifle cartridges are crimped for consistent dependability. Other cartridges are crimped for accuracy and SD improvement. I personally have had bullets that had plenty of neck tension move forward and jab in the magazine.</p><p></p><p>I am a big fan of crimping for many reasons and believe it adds to the quality of some cartridges and uses. The bigger/heavier a bullet is, the more chances are that I will crimp them. Many people don't believe in crimping at all, and they may have a rifle/pistol that could benefit from crimping but wont try crimping and find out if it helps.</p><p></p><p>I am near the end of a test for the effects of crimping a 22 WMR. The results have been an eye opener The last test that will be performed will be to see how much crimping is best. So far crimping has improved the SD's from 48 ft/sec to 16 ft/sec with the same crimp diameter, and the velocity of the 30 grain load from 2133 ft/sec to 2294 ft/sec (161 ft/sec faster). the final test should prove what crimp pressure is best for all round performance. the worst SD ammo produced a sd of 181 ft/sec and after crimping it went to 59 ft/sec. the best ammo for my rifle a produced a SD of 48 ft/sec un crimped and a SD of 9 with a heavy crimp. so crimping went from 181 ft/sec to 9 ft/sec SD's. I would have to say it can change many cartridges.</p><p></p><p>It is not exactly the results I thought I would get because it is such a low pressure load and light bullet, but it did prove that crimping can be a benefit in some cartridges even if only to maintain COAL.</p><p></p><p>I will read all of the post to get the consensus of all, But like everything else in this sport, There is no one way only to do things. <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /> <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /> <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 2012024, member: 2736"] For many years and many reasons, people have been crimping. I still crimp some cartridges and don't crimp others. Most if not all dangerous game rifle cartridges are crimped for consistent dependability. Other cartridges are crimped for accuracy and SD improvement. I personally have had bullets that had plenty of neck tension move forward and jab in the magazine. I am a big fan of crimping for many reasons and believe it adds to the quality of some cartridges and uses. The bigger/heavier a bullet is, the more chances are that I will crimp them. Many people don't believe in crimping at all, and they may have a rifle/pistol that could benefit from crimping but wont try crimping and find out if it helps. I am near the end of a test for the effects of crimping a 22 WMR. The results have been an eye opener The last test that will be performed will be to see how much crimping is best. So far crimping has improved the SD's from 48 ft/sec to 16 ft/sec with the same crimp diameter, and the velocity of the 30 grain load from 2133 ft/sec to 2294 ft/sec (161 ft/sec faster). the final test should prove what crimp pressure is best for all round performance. the worst SD ammo produced a sd of 181 ft/sec and after crimping it went to 59 ft/sec. the best ammo for my rifle a produced a SD of 48 ft/sec un crimped and a SD of 9 with a heavy crimp. so crimping went from 181 ft/sec to 9 ft/sec SD's. I would have to say it can change many cartridges. It is not exactly the results I thought I would get because it is such a low pressure load and light bullet, but it did prove that crimping can be a benefit in some cartridges even if only to maintain COAL. I will read all of the post to get the consensus of all, But like everything else in this sport, There is no one way only to do things. 👍 👍 👍 J E CUSTOM [/QUOTE]
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