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Rifles, Reloading, Optics, Equipment
Reloading
How does chopping a barrel alter velocity nodes?
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<blockquote data-quote="steffen707" data-source="post: 2098319" data-attributes="member: 116853"><p>7remmag is what I decided is the sweet spot for a north american gun for me. small enough that its not overkill on smaller game, and can handle 160-175gr bullets without losing a lot of velocity like a 7mm-08, couple that with my desire to run a 7" Ultra7 supressor, and not have the barrel/supressor be 31" long. </p><p></p><p>Ultra7 says rated for 18"+ barrel length. So I don't want to go shorter, plus probably lose more FPS / Inch from 18-16" than say 20-18".</p><p></p><p>going from a 28 to 20" this guy lost about 26.6FPS per inch average over 4 different catridges tested. <a href="https://rifleshooter.com/2015/04/7mm-remington-magnum-7-rem-mag-barrel-length-versus-velocity/" target="_blank">https://rifleshooter.com/2015/04/7mm-remington-magnum-7-rem-mag-barrel-length-versus-velocity/</a></p><p></p><p>This is his same data from 24" to 20", only 24.13 fps/inch reduced</p><p></p><p> 24" 2881 2942 2897 2615 </p><p> 20" 2719 2836 2746 2455 </p><p>Difference 162 106 151 160 </p><p> 27.00 17.67 25.17 26.67 Average 24.13</p><p></p><p>If i only drop 150fps, i'm willing to make that compromise for 6" less barrel catching on stuff.</p></blockquote><p></p>
[QUOTE="steffen707, post: 2098319, member: 116853"] 7remmag is what I decided is the sweet spot for a north american gun for me. small enough that its not overkill on smaller game, and can handle 160-175gr bullets without losing a lot of velocity like a 7mm-08, couple that with my desire to run a 7" Ultra7 supressor, and not have the barrel/supressor be 31" long. Ultra7 says rated for 18"+ barrel length. So I don't want to go shorter, plus probably lose more FPS / Inch from 18-16" than say 20-18". going from a 28 to 20" this guy lost about 26.6FPS per inch average over 4 different catridges tested. [URL]https://rifleshooter.com/2015/04/7mm-remington-magnum-7-rem-mag-barrel-length-versus-velocity/[/URL] This is his same data from 24" to 20", only 24.13 fps/inch reduced 24" 2881 2942 2897 2615 20" 2719 2836 2746 2455 Difference 162 106 151 160 27.00 17.67 25.17 26.67 Average 24.13 If i only drop 150fps, i'm willing to make that compromise for 6" less barrel catching on stuff. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How does chopping a barrel alter velocity nodes?
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