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Rifles, Reloading, Optics, Equipment
Reloading
crushing case necks when using expander mandrel to open case neck on a 338SS
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<blockquote data-quote="Calvin45" data-source="post: 2874972" data-attributes="member: 109862"><p>This is where old fashioned cartridges with less aggressive shoulders have their strengths. </p><p></p><p>I don't anneal or even use an intermediate sizing step when forming 300 win mag to .358 Norma. One pass and done. Every now and then a neck splits but I see that as weeding out the brittle necked cases to begin with <img class="smilie smilie--emoji" loading="lazy" alt="😁" title="Beaming face with smiling eyes :grin:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f601.png" data-shortname=":grin:" /> </p><p></p><p>No shoulder crush. </p><p></p><p>But I agree with others that you'd probably be well served by adding an 8mm .323 expansion to this process if this is happening to you. </p><p></p><p>Sorry to hear the company you're working with don't have the right mandrel for ya. But you could always just use a boring old resizing die/expander ball combo <img class="smilie smilie--emoji" loading="lazy" alt="🤣" title="Rolling on the floor laughing :rofl:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f923.png" data-shortname=":rofl:" />. It's not the final product anyway, just on the way there. Any die with that .550" case body diameter and a 8mm expander ball should work for this intermediate step, obviously not to resize the whole dang case but just to run the neck through.</p></blockquote><p></p>
[QUOTE="Calvin45, post: 2874972, member: 109862"] This is where old fashioned cartridges with less aggressive shoulders have their strengths. I don’t anneal or even use an intermediate sizing step when forming 300 win mag to .358 Norma. One pass and done. Every now and then a neck splits but I see that as weeding out the brittle necked cases to begin with 😁 No shoulder crush. But I agree with others that you’d probably be well served by adding an 8mm .323 expansion to this process if this is happening to you. Sorry to hear the company you’re working with don’t have the right mandrel for ya. But you could always just use a boring old resizing die/expander ball combo 🤣. It’s not the final product anyway, just on the way there. Any die with that .550” case body diameter and a 8mm expander ball should work for this intermediate step, obviously not to resize the whole dang case but just to run the neck through. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
crushing case necks when using expander mandrel to open case neck on a 338SS
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