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Rifles, Reloading, Optics, Equipment
Reloading
.223 rem Neck I.D. after sizing ( Help )
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<blockquote data-quote="Trickymissfit" data-source="post: 475132" data-attributes="member: 25383"><p>with you numbers, I see a .0195" neck wall thickness. That seems rather excessive. I just checked three virgin Winchester .223 cases (right outta the bag, and unsized), and the necks were .245 to .2455 on the O.D. with an I. D. that ranged from .220" to .2205". Or roughly a .012" neck wall thickness. By chance are you using military brass? For these cases (as they are right now) you would need a .219" to .2195" mandrel. I would take a couple of sized cases, and polish the mandrel to where it slides into the I.D. Now for the next issue. For some odd reason the necks diameters seem oversize. You can turn them down to about .250", or perhaps try a Lee Collet die (assuming it will open up that much). What is the neck diamter on a loaded round? Also do you see any excessive pressure signs after firing a round? Personally I don't think the issue is die related, but with the brass if your numbers are good.</p><p>gary</p><p> </p><p>P.S. Have your buddy make a new mandrel that's .219" after polishing. Don't worry about it not being hard because your only going to trim a couple rounds. Trim two or three cases, and then load them. You should see .250" (+/- .003") on the O.D. with a loaded round. If your bigger than that, you need to turn the necks a little bit or seek different brass</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 475132, member: 25383"] with you numbers, I see a .0195" neck wall thickness. That seems rather excessive. I just checked three virgin Winchester .223 cases (right outta the bag, and unsized), and the necks were .245 to .2455 on the O.D. with an I. D. that ranged from .220" to .2205". Or roughly a .012" neck wall thickness. By chance are you using military brass? For these cases (as they are right now) you would need a .219" to .2195" mandrel. I would take a couple of sized cases, and polish the mandrel to where it slides into the I.D. Now for the next issue. For some odd reason the necks diameters seem oversize. You can turn them down to about .250", or perhaps try a Lee Collet die (assuming it will open up that much). What is the neck diamter on a loaded round? Also do you see any excessive pressure signs after firing a round? Personally I don't think the issue is die related, but with the brass if your numbers are good. gary P.S. Have your buddy make a new mandrel that's .219" after polishing. Don't worry about it not being hard because your only going to trim a couple rounds. Trim two or three cases, and then load them. You should see .250" (+/- .003") on the O.D. with a loaded round. If your bigger than that, you need to turn the necks a little bit or seek different brass [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.223 rem Neck I.D. after sizing ( Help )
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