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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Which 30 cal?
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<blockquote data-quote="lancetkenyon" data-source="post: 2027637" data-attributes="member: 68875"><p>I can't remember the numbers off the top of my head, so I will throw some arbitrary ones out. </p><p>Let's say the .300WM produces fired brass with a base to shoulder datum with a .420 comparator of 2.275". New virgin brass measures around 2.255"-2.260", meaning .020"-.015" short on headspace. That is a lot of room to stretch.</p><p>The Peterson .300WM Long comes virgin length at 2.273". Just a .002" headspace, which is where I bump my fired shoulders back to when I FL size a fired round.</p><p>I never did understand why virgin brass for the belted mags come so short on headspace. Most 7RM virgin brass is the same way.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 2027637, member: 68875"] I can't remember the numbers off the top of my head, so I will throw some arbitrary ones out. Let's say the .300WM produces fired brass with a base to shoulder datum with a .420 comparator of 2.275". New virgin brass measures around 2.255"-2.260", meaning .020"-.015" short on headspace. That is a lot of room to stretch. The Peterson .300WM Long comes virgin length at 2.273". Just a .002" headspace, which is where I bump my fired shoulders back to when I FL size a fired round. I never did understand why virgin brass for the belted mags come so short on headspace. Most 7RM virgin brass is the same way. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Which 30 cal?
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