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Rifles, Reloading, Optics, Equipment
Reloading
Reloading 7mm Rem mag
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<blockquote data-quote="Bart B" data-source="post: 677258" data-attributes="member: 5302"><p>I've had Winchester brand .338 Win. Mag. brass with belts headspacing at .218". SAAMI spec's state headspace is .212" to .220", but if sized cases headspace off their shoulders, then belt headspace doesn't matter. Especially if you somehow size the body diameters immediately in front of the belt back to virtual new case dimensions.</p><p></p><p>I find it amazing that new .30-.338 Win. Mag. cases (.300 or .338 Win. Mag. ones sized down in a .30-.338 FL die to hold 30 caliber bullets; longer necks with .300 cases) with shoulders back far enough that when the belt stops against the chamber headspace ridge and its shoulder's back a few thousandths from the chamber shoulder, fairly straight ammo will shoot well under 3/4 MOA at 1000 from SAAMI spec chambers. Brand new .300 Win. Mag. cases have also done as well.</p></blockquote><p></p>
[QUOTE="Bart B, post: 677258, member: 5302"] I've had Winchester brand .338 Win. Mag. brass with belts headspacing at .218". SAAMI spec's state headspace is .212" to .220", but if sized cases headspace off their shoulders, then belt headspace doesn't matter. Especially if you somehow size the body diameters immediately in front of the belt back to virtual new case dimensions. I find it amazing that new .30-.338 Win. Mag. cases (.300 or .338 Win. Mag. ones sized down in a .30-.338 FL die to hold 30 caliber bullets; longer necks with .300 cases) with shoulders back far enough that when the belt stops against the chamber headspace ridge and its shoulder's back a few thousandths from the chamber shoulder, fairly straight ammo will shoot well under 3/4 MOA at 1000 from SAAMI spec chambers. Brand new .300 Win. Mag. cases have also done as well. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Reloading 7mm Rem mag
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