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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
is the 7wsm dead?
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<blockquote data-quote="Engineering101" data-source="post: 755539" data-attributes="member: 63138"><p>Iron Worker</p><p> </p><p>I too shoot the 162 grain AMAX as my practice load as the Barnes LRXs are bit on the pricey side. I load it down to 2,948 fps to hit an accuracy node.</p><p> </p><p>By the way, though I said I can see how you could get the velocity you mentioned on your 139 grain SST load, it is running around 65 fps FASTER than a 7mm RUM will do with equal barrel lengths using its best powder. Since there are no free lunches I'd be a bit concerned that your pressures are higher than you might like. I'd probably back it down until you get really good accuracy and use it there.</p><p> </p><p>Another thought on your chrograph. Do you use a laser boresighter to align it? I hang see through plastic in mine that I've marked with a grid in both the front and back screens. Just put the boresight laser in the rifle bore when the rifle is pointed at your target, make the laser dot hit the pastic in the same spot on the grid for both screens and you get perfect alignment which leads to repeatable chrono readings.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Engineering101, post: 755539, member: 63138"] Iron Worker I too shoot the 162 grain AMAX as my practice load as the Barnes LRXs are bit on the pricey side. I load it down to 2,948 fps to hit an accuracy node. By the way, though I said I can see how you could get the velocity you mentioned on your 139 grain SST load, it is running around 65 fps FASTER than a 7mm RUM will do with equal barrel lengths using its best powder. Since there are no free lunches I'd be a bit concerned that your pressures are higher than you might like. I'd probably back it down until you get really good accuracy and use it there. Another thought on your chrograph. Do you use a laser boresighter to align it? I hang see through plastic in mine that I've marked with a grid in both the front and back screens. Just put the boresight laser in the rifle bore when the rifle is pointed at your target, make the laser dot hit the pastic in the same spot on the grid for both screens and you get perfect alignment which leads to repeatable chrono readings.:) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
is the 7wsm dead?
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