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Rifles, Reloading, Optics, Equipment
Reloading
Nosler 6.5mm 129 LRAB Problem
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<blockquote data-quote="Chopaka81" data-source="post: 1917476" data-attributes="member: 9217"><div style="text-align: left"><span style="font-size: 16px"><span style="font-family: 'Segoe UI'"><span style="color: rgb(21, 21, 20)">Reading thru the conversation regarding neck tension, </span></span></span></div><p>I think I have a couple issues contributing to the seating problem with the Nosler 129gr LRAB.. </p><p>The rifle is chambered for 260 Ackley (40 deg). </p><p>I am using fire formed Lapua 260 Rem brass with 48.5 - 49.1 grs of H4831SC. </p><p>What I have not done is trim the outside neck diameters (which will reduce neck tension - eventually), nor have I trimmed the cases to a common overall length. I need to do that because I am (or was) using a very light crimp. This crimp could be contributing to the compression ring issue on the softer tipped LRAB bullets.</p><p>Overall the <div style="text-align: left"><span style="font-size: 16px"><span style="font-family: 'Segoe UI'"><span style="color: rgb(21, 21, 20)">fire formed </span></span></span></div><p>Lapua brass is about 10 mills shorter than the SAMMI trim to length of 2.025" for 260 REM, but the cases do vary in length from 2.011" to 2.017". </p><p>Going forward, I am going to do the following:</p><p>#1, uniform the brass length, uniform the outside neck diameters, and uniform the flash holes. </p><p>#2, install the VLD Bullet seater into the seat die prior to doing any further reloading. </p><p>#3, back off the seat die in the press so no crimping is occurring. </p><p></p><p>Truly, I do appreciate the advice gentlemen. </p><p>Don</p></blockquote><p></p>
[QUOTE="Chopaka81, post: 1917476, member: 9217"] [LEFT][SIZE=16px][FONT=Segoe UI][COLOR=rgb(21, 21, 20)]Reading thru the conversation regarding neck tension, [/COLOR][/FONT][/SIZE][/LEFT]I think I have a couple issues contributing to the seating problem with the Nosler 129gr LRAB.. The rifle is chambered for 260 Ackley (40 deg). I am using fire formed Lapua 260 Rem brass with 48.5 - 49.1 grs of H4831SC. What I have not done is trim the outside neck diameters (which will reduce neck tension - eventually), nor have I trimmed the cases to a common overall length. I need to do that because I am (or was) using a very light crimp. This crimp could be contributing to the compression ring issue on the softer tipped LRAB bullets. Overall the [LEFT][SIZE=16px][FONT=Segoe UI][COLOR=rgb(21, 21, 20)]fire formed [/COLOR][/FONT][/SIZE][/LEFT]Lapua brass is about 10 mills shorter than the SAMMI trim to length of 2.025" for 260 REM, but the cases do vary in length from 2.011" to 2.017". Going forward, I am going to do the following: #1, uniform the brass length, uniform the outside neck diameters, and uniform the flash holes. #2, install the VLD Bullet seater into the seat die prior to doing any further reloading. #3, back off the seat die in the press so no crimping is occurring. Truly, I do appreciate the advice gentlemen. Don [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Nosler 6.5mm 129 LRAB Problem
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