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Rifles, Reloading, Optics, Equipment
Reloading
30-338 case forming (or necking down in general)
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<blockquote data-quote="Bart B" data-source="post: 94337" data-attributes="member: 5302"><p>Doug, from what you're saying, I don't know enough to help you. But here's what I've learned from wearing out four .30-.338 barrels.</p><p></p><p>Necking down Winchester .338 Mag. cases in my RCBS or Bonanza full-length sizing dies has always been easy. My dies' necks are lapped out to about .3350-inch diameter so I won't have to use the expander ball for reloading fired .30-.338 cases. I lightly lube all the outside of the new unfired cases, then run them through the die using a .3085-inch expander ball. That makes the case mouth a snug fit on my neck turning tool's .3080-inch mandrel so I can turn the necks a bit.</p><p></p><p>I've used Winchester and Federal .300 Win. Mag. cases to make the long-neck version the same way.</p><p></p><p>About your problem, remove the decapping rod and expander ball from your full-length die, then size some .300 Win. Mag. and some .338 Win. Mag. cases. See if their necks are straight. If they are, your cases with bent necks were probably made that way by the expander ball. Next time, clean the fired .300 Win. Mag. and .338 Win. Mag. cases' mouth with a bore brush on a drill. Then lightly lube the mouths inside using a cotton swab. Finally full-length resize these prepped cases and see what happens.</p><p></p><p>If you could explain in detail exactly what you're doing to set up the die and size the cases, that might help me help you.</p></blockquote><p></p>
[QUOTE="Bart B, post: 94337, member: 5302"] Doug, from what you're saying, I don't know enough to help you. But here's what I've learned from wearing out four .30-.338 barrels. Necking down Winchester .338 Mag. cases in my RCBS or Bonanza full-length sizing dies has always been easy. My dies' necks are lapped out to about .3350-inch diameter so I won't have to use the expander ball for reloading fired .30-.338 cases. I lightly lube all the outside of the new unfired cases, then run them through the die using a .3085-inch expander ball. That makes the case mouth a snug fit on my neck turning tool's .3080-inch mandrel so I can turn the necks a bit. I've used Winchester and Federal .300 Win. Mag. cases to make the long-neck version the same way. About your problem, remove the decapping rod and expander ball from your full-length die, then size some .300 Win. Mag. and some .338 Win. Mag. cases. See if their necks are straight. If they are, your cases with bent necks were probably made that way by the expander ball. Next time, clean the fired .300 Win. Mag. and .338 Win. Mag. cases' mouth with a bore brush on a drill. Then lightly lube the mouths inside using a cotton swab. Finally full-length resize these prepped cases and see what happens. If you could explain in detail exactly what you're doing to set up the die and size the cases, that might help me help you. [/QUOTE]
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Reloading
30-338 case forming (or necking down in general)
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