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Rifles, Reloading, Optics, Equipment
Reloading
Reloading 300 Win Mag
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<blockquote data-quote="ShtrRdy" data-source="post: 2111946" data-attributes="member: 40852"><p>The belted magnum case was designed to headspace off the belt. This was done because the original cartridge was the 375 H&H Magnum. It had very little shoulder to work with. </p><p></p><p>Since the 300 Win Mag has a nice shoulder it's a very good idea to only push the shoulder back as much as needed. Don't push it as far back as many sizing dies will allow you to do. By doing this we can avoid the dreaded case head separation problem.</p><p></p><p>The other problem that tends to develop is what I think you're asking about, is the case having a bulge just above the belt. This can be remedied by using the Willis Belted Magnum Collet die. It doesn't have to be done every time you resize a belted magnum, but rather after several resizing cycles.</p></blockquote><p></p>
[QUOTE="ShtrRdy, post: 2111946, member: 40852"] The belted magnum case was designed to headspace off the belt. This was done because the original cartridge was the 375 H&H Magnum. It had very little shoulder to work with. Since the 300 Win Mag has a nice shoulder it's a very good idea to only push the shoulder back as much as needed. Don't push it as far back as many sizing dies will allow you to do. By doing this we can avoid the dreaded case head separation problem. The other problem that tends to develop is what I think you're asking about, is the case having a bulge just above the belt. This can be remedied by using the Willis Belted Magnum Collet die. It doesn't have to be done every time you resize a belted magnum, but rather after several resizing cycles. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Reloading 300 Win Mag
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