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Rifles, Reloading, Optics, Equipment
Reloading
This is why we have "starting loads".
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<blockquote data-quote="Pdvdh" data-source="post: 1121230" data-attributes="member: 4191"><p>I had a similar experience recently with Speer load data for their 200gr Trophy Bonded Bear Claw bullet in my 300 Win Mag.</p><p></p><p>Max Load data from Speer is 74.5gr IMR 7828 with a MV = 2836fps. I loaded 72.0gr 7828 and recorded a MV = 2984fps, with some signs of excess pressure on the Lapua brass.</p><p></p><p>I backed down to 71.5gr with a MV=2970fps. I'm using 3gr less powder and I'm 135fps faster than their maximum load. And this is with HBN coated bullets, which normally require some additional powder to reach equivalent pressure/MV.</p><p></p><p>My MVs were chronographed over three separate chronographs. One being an Oehler 35P. </p><p></p><p>Speer may have changed their design of this bullet? Or they may have an error within their reload data? Dunno... They don't offer this bullet for the reloader any longer. I had an old box of 25 bullets in my reloading room.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1121230, member: 4191"] I had a similar experience recently with Speer load data for their 200gr Trophy Bonded Bear Claw bullet in my 300 Win Mag. Max Load data from Speer is 74.5gr IMR 7828 with a MV = 2836fps. I loaded 72.0gr 7828 and recorded a MV = 2984fps, with some signs of excess pressure on the Lapua brass. I backed down to 71.5gr with a MV=2970fps. I'm using 3gr less powder and I'm 135fps faster than their maximum load. And this is with HBN coated bullets, which normally require some additional powder to reach equivalent pressure/MV. My MVs were chronographed over three separate chronographs. One being an Oehler 35P. Speer may have changed their design of this bullet? Or they may have an error within their reload data? Dunno... They don't offer this bullet for the reloader any longer. I had an old box of 25 bullets in my reloading room. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
This is why we have "starting loads".
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