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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Temp sensitivity in 7mm mag
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<blockquote data-quote="fiftybmg" data-source="post: 1752534" data-attributes="member: 96316"><p>Another thing - that 300 fps calculated velocity difference doesn't sound right, hence the suggestion for chrony verification, and looking at possible scope malfuntion.</p><p></p><p>Your load should be around 3000 fps from the factory. +300 fps would stick the bolt and stretch the primer pockets so far that the primer would be blown out. </p><p></p><p>If you put some cartridges in a freezer, and some on your dash in the sun on a warm day, the difference in velocity is expected to be around 3 percent, provided the powder is temperature sensitive.</p></blockquote><p></p>
[QUOTE="fiftybmg, post: 1752534, member: 96316"] Another thing - that 300 fps calculated velocity difference doesn't sound right, hence the suggestion for chrony verification, and looking at possible scope malfuntion. Your load should be around 3000 fps from the factory. +300 fps would stick the bolt and stretch the primer pockets so far that the primer would be blown out. If you put some cartridges in a freezer, and some on your dash in the sun on a warm day, the difference in velocity is expected to be around 3 percent, provided the powder is temperature sensitive. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Temp sensitivity in 7mm mag
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