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Rifles, Reloading, Optics, Equipment
Reloading
Help me determine what is causing my runout!
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<blockquote data-quote="dmproske" data-source="post: 303931" data-attributes="member: 10838"><p><span style="color: black"><span style="font-family: 'Verdana'">Am loading once fired brass (batch of 50 </span></span><span style="color: black"><span style="font-family: 'Verdana'">Winchester</span></span><span style="color: black"><span style="font-family: 'Verdana'">) out of a Remington M700 in .308 </span></span><span style="color: black"><span style="font-family: 'Verdana'">Winchester</span></span><span style="color: black"><span style="font-family: 'Verdana'">.</span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">Measuring runout with a Sinclair runout gauge.</span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">Runout started at half a thousandth to 1.5 thousandths right out of the chamber. Sized them with a Lee Collet die. Most ran 1 thousandths to 3 thousandths neck runout. There were a few that ran more than that, but I culled them out. All were inside chamfered.</span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">I seated 168 SMK's using a </span></span><span style="color: black"><span style="font-family: 'Verdana'">Redding</span></span><span style="color: black"><span style="font-family: 'Verdana'"> competition seating die. A few had really good bullet runout 2-3 thousandths, but the norm was 3-5 thousandths. Some ran really high....like 8-10 thousandths. A couple was like 12-15, but I pulled the bullet, resized the case and reseated, and was left with 7 thousandths for that one....</span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">How in the world can a case that starts with 1-2 thousandths neck runout, end up with 5-8 and sometimes greater bullet runout when seated with a precision die like the Redding Competition seater??? </span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">Is it varying inside neck thickness? I understood that was pushed to the outside when sized with the collet die, and would show up in neck runout?</span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">Is better brass like Lapua the answer? I could neck turn, but I have a factory rifle, and understood that neck turning could have negative effects in a loose chamber.</span></span></p><p> </p><p><span style="color: black"><span style="font-family: 'Verdana'">Thanks in advance</span></span></p></blockquote><p></p>
[QUOTE="dmproske, post: 303931, member: 10838"] [COLOR=black][FONT=Verdana]Am loading once fired brass (batch of 50 [/FONT][/COLOR][COLOR=black][FONT=Verdana]Winchester[/FONT][/COLOR][COLOR=black][FONT=Verdana]) out of a Remington M700 in .308 [/FONT][/COLOR][COLOR=black][FONT=Verdana]Winchester[/FONT][/COLOR][COLOR=black][FONT=Verdana].[/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]Measuring runout with a Sinclair runout gauge.[/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]Runout started at half a thousandth to 1.5 thousandths right out of the chamber. Sized them with a Lee Collet die. Most ran 1 thousandths to 3 thousandths neck runout. There were a few that ran more than that, but I culled them out. All were inside chamfered.[/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]I seated 168 SMK's using a [/FONT][/COLOR][COLOR=black][FONT=Verdana]Redding[/FONT][/COLOR][COLOR=black][FONT=Verdana] competition seating die. A few had really good bullet runout 2-3 thousandths, but the norm was 3-5 thousandths. Some ran really high....like 8-10 thousandths. A couple was like 12-15, but I pulled the bullet, resized the case and reseated, and was left with 7 thousandths for that one....[/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]How in the world can a case that starts with 1-2 thousandths neck runout, end up with 5-8 and sometimes greater bullet runout when seated with a precision die like the Redding Competition seater??? [/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]Is it varying inside neck thickness? I understood that was pushed to the outside when sized with the collet die, and would show up in neck runout?[/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]Is better brass like Lapua the answer? I could neck turn, but I have a factory rifle, and understood that neck turning could have negative effects in a loose chamber.[/FONT][/COLOR] [COLOR=black][FONT=Verdana][/FONT][/COLOR] [COLOR=black][FONT=Verdana]Thanks in advance[/FONT][/COLOR] [FONT=Times New Roman][SIZE=3] [/SIZE][/FONT] [/QUOTE]
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Help me determine what is causing my runout!
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