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Rifles, Reloading, Optics, Equipment
Reloading
Neck sizing and overpressure signs in 338LM
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<blockquote data-quote="bigsampson" data-source="post: 478434" data-attributes="member: 28753"><p>Well,</p><p>I know the pressure is too high, hence the title of the thread, "Re: Neck sizing and overpressure signs in 338LM"</p><p> </p><p>I could understand having to bump the shoulder back after two or three reloads, but after one firing? The rounds chamber fine, maybe a little more force than a full length resize. And I agree that bumping the shoulder is required. That is why I have put the neck sizer away.</p><p> </p><p>Is this something that is more common in big cartridges like 338 LM and the RUMs? Have never seen it in 308, 223, 30-30, 30-30AI, 300WM or any of the other rounds I load for. Or is it because my chamber is on the tight side? I guess I am trying to say that I don't understand the dynamic here. The round is a safe, well under max load that fits in the chamber. The neck has been resized and the shoulder is within enough tolerance that it fits the chamber. Yet it is developing more pressure than a full length case of the same load.</p><p> </p><p>I figured on a factory Rem 700 action and barrel neck sizing would enhance accuracy. But on this gun I guess not.</p></blockquote><p></p>
[QUOTE="bigsampson, post: 478434, member: 28753"] Well, I know the pressure is too high, hence the title of the thread, "Re: Neck sizing and overpressure signs in 338LM" I could understand having to bump the shoulder back after two or three reloads, but after one firing? The rounds chamber fine, maybe a little more force than a full length resize. And I agree that bumping the shoulder is required. That is why I have put the neck sizer away. Is this something that is more common in big cartridges like 338 LM and the RUMs? Have never seen it in 308, 223, 30-30, 30-30AI, 300WM or any of the other rounds I load for. Or is it because my chamber is on the tight side? I guess I am trying to say that I don't understand the dynamic here. The round is a safe, well under max load that fits in the chamber. The neck has been resized and the shoulder is within enough tolerance that it fits the chamber. Yet it is developing more pressure than a full length case of the same load. I figured on a factory Rem 700 action and barrel neck sizing would enhance accuracy. But on this gun I guess not. [/QUOTE]
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Neck sizing and overpressure signs in 338LM
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