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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Lapua Improved 40 degree with print. Which design is better?
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<blockquote data-quote="Pdvdh" data-source="post: 1083001" data-attributes="member: 4191"><p>I don't believe that's an issue if you outside neck turn the case necks to a uniform thickness. Perhaps it's correct if you're not outside neck turning. Look at the "Speedy" and "Nathan Dagley" spec sheets. Both of these gunsmiths are very experienced. The case neck will never offer enough resistance to cause difficult case extraction, in my opinion. Not enough surface area and length on the case neck to cause significant friction binding. The case body has much more surface area and length, so yes that can cause problems. That's my take on it.</p><p></p><p>Anyhow, Despotes - be sure to inform your chamber reamer manufacturer whether or not you intend to outside neck turn your cases or not. Then they'll know how to spec out the neck OD on the neck reamer. Dave Kiff (PTG) had some factory loaded .338 Lapua brass next to him when we talked on the phone. He placed his calipers on the OD of the necks on this loaded brass and provided me with the OD. I was thus able to confirm that 0.370" neck OD on my neck reamer would be good for outside neck turned brass. You want the chamber to be about 0.004" larger in diameter than the casing necks with the bullets seated in them. </p><p></p><p>It's no coincidence that Nathan Dagley spec'd the same neck OD on his neck reamer. I'm sure Nathan was planning on uniforming the necks on his brass, as I intend to do also. Speedy spec'd his neck OD at 0.371", both at the shoulder and at the case mouth.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1083001, member: 4191"] I don't believe that's an issue if you outside neck turn the case necks to a uniform thickness. Perhaps it's correct if you're not outside neck turning. Look at the "Speedy" and "Nathan Dagley" spec sheets. Both of these gunsmiths are very experienced. The case neck will never offer enough resistance to cause difficult case extraction, in my opinion. Not enough surface area and length on the case neck to cause significant friction binding. The case body has much more surface area and length, so yes that can cause problems. That's my take on it. Anyhow, Despotes - be sure to inform your chamber reamer manufacturer whether or not you intend to outside neck turn your cases or not. Then they'll know how to spec out the neck OD on the neck reamer. Dave Kiff (PTG) had some factory loaded .338 Lapua brass next to him when we talked on the phone. He placed his calipers on the OD of the necks on this loaded brass and provided me with the OD. I was thus able to confirm that 0.370" neck OD on my neck reamer would be good for outside neck turned brass. You want the chamber to be about 0.004" larger in diameter than the casing necks with the bullets seated in them. It's no coincidence that Nathan Dagley spec'd the same neck OD on his neck reamer. I'm sure Nathan was planning on uniforming the necks on his brass, as I intend to do also. Speedy spec'd his neck OD at 0.371", both at the shoulder and at the case mouth. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Lapua Improved 40 degree with print. Which design is better?
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