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Rifles, Reloading, Optics, Equipment
Reloading
Necking 30-06 to 25-06 results in blown primer
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<blockquote data-quote="oneeyejohn" data-source="post: 2185638" data-attributes="member: 85797"><p>Necking from .308 down to .257 is a long way to stuff brass together. That is .051 reduction in neck size, the brass has to go somewhere, so it thickens the neck. I have had it make a donut in a .264 case and extend the neck .012 in length. If your case neck is .015 thick you will often add .003 to .005 thickness to the neck. A tight chamber neck may not like a neck that thick. If you size the neck first you may not be able to get the lathe mandrel into the smaller neck. Trim neck thickness down to .012-.013 before resizing. That has been my best experience. It caused enough of a problem in my 6.5-06 that I changed to ,270 brass and finely opened up 25-06 brass for the best results.</p></blockquote><p></p>
[QUOTE="oneeyejohn, post: 2185638, member: 85797"] Necking from .308 down to .257 is a long way to stuff brass together. That is .051 reduction in neck size, the brass has to go somewhere, so it thickens the neck. I have had it make a donut in a .264 case and extend the neck .012 in length. If your case neck is .015 thick you will often add .003 to .005 thickness to the neck. A tight chamber neck may not like a neck that thick. If you size the neck first you may not be able to get the lathe mandrel into the smaller neck. Trim neck thickness down to .012-.013 before resizing. That has been my best experience. It caused enough of a problem in my 6.5-06 that I changed to ,270 brass and finely opened up 25-06 brass for the best results. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Necking 30-06 to 25-06 results in blown primer
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