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Rifles, Reloading, Optics, Equipment
Reloading
223 - Help explaining these pressure signs
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<blockquote data-quote="dsmhero" data-source="post: 972703" data-attributes="member: 81510"><p>This is my first load up of 223 but I am getting some odd pressure signs when I believe there shouldn't be. </p><p></p><p>Data: </p><p>RRA LAR-15</p><p>16" barrel</p><p>Cheap 224 55grain fmj bullets I bought at a gunshow</p><p>COAL - 2.235</p><p>Accurate 2230</p><p>6 1/2 primers</p><p>Once shot mil brass</p><p></p><p>So I did a load up of 22grains - 24grains by 0.5grain increments. Outside temp was 85F. </p><p></p><p>At 23grains I had one pierced primer out of 10 rounds. </p><p><a href="http://s68.photobucket.com/user/guitarhero14/media/Mobile%20Uploads/20140719_152958_zpsjnuqog3o.jpg.html" target="_blank"><img src="http://i68.photobucket.com/albums/i5/guitarhero14/Mobile%20Uploads/20140719_152958_zpsjnuqog3o.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>Back row is 23.5 and front is 24 grains</p><p><a href="http://s68.photobucket.com/user/guitarhero14/media/Mobile%20Uploads/20140719_174227_zpsecwccosy.jpg.html" target="_blank"><img src="http://i68.photobucket.com/albums/i5/guitarhero14/Mobile%20Uploads/20140719_174227_zpsecwccosy.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>I was getting extractor marks at 23.5</p><p><a href="http://s68.photobucket.com/user/guitarhero14/media/Mobile%20Uploads/20140719_174400_zpsk98l5nl0.jpg.html" target="_blank"><img src="http://i68.photobucket.com/albums/i5/guitarhero14/Mobile%20Uploads/20140719_174400_zpsk98l5nl0.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>Here is the chrono data:</p><p>22grains - Average 2686 fps with sd 70 fps</p><p>22.5 grains - Average 2708 fps with sd 57 fps</p><p>23 grains - Average 2760 fps with sd 41 fps</p><p>23.5 grains - Average 2779 fps with sd 54 fps</p><p>24 grains - Average 2872 fps with sd 44 fps</p><p></p><p>Any idea on what is going on and if I am actually pushing this charge too far?</p></blockquote><p></p>
[QUOTE="dsmhero, post: 972703, member: 81510"] This is my first load up of 223 but I am getting some odd pressure signs when I believe there shouldn't be. Data: RRA LAR-15 16" barrel Cheap 224 55grain fmj bullets I bought at a gunshow COAL - 2.235 Accurate 2230 6 1/2 primers Once shot mil brass So I did a load up of 22grains - 24grains by 0.5grain increments. Outside temp was 85F. At 23grains I had one pierced primer out of 10 rounds. [URL=http://s68.photobucket.com/user/guitarhero14/media/Mobile%20Uploads/20140719_152958_zpsjnuqog3o.jpg.html][IMG]http://i68.photobucket.com/albums/i5/guitarhero14/Mobile%20Uploads/20140719_152958_zpsjnuqog3o.jpg[/IMG][/URL] Back row is 23.5 and front is 24 grains [URL=http://s68.photobucket.com/user/guitarhero14/media/Mobile%20Uploads/20140719_174227_zpsecwccosy.jpg.html][IMG]http://i68.photobucket.com/albums/i5/guitarhero14/Mobile%20Uploads/20140719_174227_zpsecwccosy.jpg[/IMG][/URL] I was getting extractor marks at 23.5 [URL=http://s68.photobucket.com/user/guitarhero14/media/Mobile%20Uploads/20140719_174400_zpsk98l5nl0.jpg.html][IMG]http://i68.photobucket.com/albums/i5/guitarhero14/Mobile%20Uploads/20140719_174400_zpsk98l5nl0.jpg[/IMG][/URL] Here is the chrono data: 22grains - Average 2686 fps with sd 70 fps 22.5 grains - Average 2708 fps with sd 57 fps 23 grains - Average 2760 fps with sd 41 fps 23.5 grains - Average 2779 fps with sd 54 fps 24 grains - Average 2872 fps with sd 44 fps Any idea on what is going on and if I am actually pushing this charge too far? [/QUOTE]
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223 - Help explaining these pressure signs
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