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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cooper - Headspace?
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<blockquote data-quote="deertroy1" data-source="post: 866665" data-attributes="member: 53905"><p>In my post <a href="http://www.longrangehunting.com/forums/f19/does-half-grain-powder-make-much-difference-122493/" target="_blank">below</a> I described having issues with trying to get my new Cooper in 7mm-08 to shoot. </p><p>I've only shot new brass but have noticed some rounds show a bit more resistance chambering than others. On a whim I decided to measure the headspace with an RCBS precision mic. I realize these aren't the most precise tool to do this but it's all I have.</p><p>What I found is that some of the new brass is actually about 0.001" - 0.002" too long. I find this to be somewhat unusual as I've seen factory rifles with too much headspace but never one with not enough. Most of the new brass measures the same or a tad more than my fired cases.</p><p>Do you think this could be the cause of the so so accuracy I've got so far?</p></blockquote><p></p>
[QUOTE="deertroy1, post: 866665, member: 53905"] In my post [URL="http://www.longrangehunting.com/forums/f19/does-half-grain-powder-make-much-difference-122493/"]below[/URL] I described having issues with trying to get my new Cooper in 7mm-08 to shoot. I've only shot new brass but have noticed some rounds show a bit more resistance chambering than others. On a whim I decided to measure the headspace with an RCBS precision mic. I realize these aren't the most precise tool to do this but it's all I have. What I found is that some of the new brass is actually about 0.001" - 0.002" too long. I find this to be somewhat unusual as I've seen factory rifles with too much headspace but never one with not enough. Most of the new brass measures the same or a tad more than my fired cases. Do you think this could be the cause of the so so accuracy I've got so far? [/QUOTE]
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Cooper - Headspace?
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