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Rifles, Reloading, Optics, Equipment
Reloading
crimp and velocity
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<blockquote data-quote="vitaminado" data-source="post: 1436434" data-attributes="member: 90319"><p>hello</p><p>I'm loading for a 338 wm.</p><p>I have to crimp because the bullets enter in the brass when they touch the magazine, due to the recoil.</p><p>brass: norma new</p><p>bullet: hornady sst 200 gr</p><p>primer: cci lr magnum</p><p>powder: vihtavuori n160</p><p>oal: cannelure bullet</p><p>medium-heavy crimp</p><p>loads:</p><p>-70gr: 2672 fps</p><p>-70.5: 2785 fps</p><p>-71: 2744 fps</p><p>-71.5: 2750 fps</p><p>-72: 2785 fps</p><p>-72.5: 2779 fps</p><p>according to the hornady manual, with 72.5 it should be around 2900 fps</p><p>What is the reason for the low velocity?</p><p>Can it be the crimp?</p><p>I put some pictures in case you see signs of pressure</p><p>[ATTACH=full]97027[/ATTACH] [ATTACH=full]97030[/ATTACH] [ATTACH=full]97034[/ATTACH] [ATTACH=full]97035[/ATTACH] [ATTACH=full]97037[/ATTACH] [ATTACH=full]97038[/ATTACH]</p></blockquote><p></p>
[QUOTE="vitaminado, post: 1436434, member: 90319"] hello I'm loading for a 338 wm. I have to crimp because the bullets enter in the brass when they touch the magazine, due to the recoil. brass: norma new bullet: hornady sst 200 gr primer: cci lr magnum powder: vihtavuori n160 oal: cannelure bullet medium-heavy crimp loads: -70gr: 2672 fps -70.5: 2785 fps -71: 2744 fps -71.5: 2750 fps -72: 2785 fps -72.5: 2779 fps according to the hornady manual, with 72.5 it should be around 2900 fps What is the reason for the low velocity? Can it be the crimp? I put some pictures in case you see signs of pressure [ATTACH=full]97027[/ATTACH] [ATTACH=full]97030[/ATTACH] [ATTACH=full]97034[/ATTACH] [ATTACH=full]97035[/ATTACH] [ATTACH=full]97037[/ATTACH] [ATTACH=full]97038[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
crimp and velocity
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