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Rifles, Reloading, Optics, Equipment
Reloading
what is your outside neck diameter 300 WM
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<blockquote data-quote="el matador" data-source="post: 1118610" data-attributes="member: 12193"><p>Depending on your chamber this might not be good. My 300 WMs are measuring .340-.341" on fired brass. SAAMI min chamber dimension is .3407". So if you have a SAAMI min chamber and ammo that's .340" at the neck you've got less than .001" clearance in there. That could create pressure problems. Hopefully you have a piece of fired brass you can measure and hopefully you are a little over SAAMI min. .002 to .005" clearance is ideal. Most factory rifles will be over the SAAMI min by several thousandths and you'll be fine. Higher end or custom guns will often be very close to the minimum chamber dimensions. If your fired cases are less than .342 at the top of the neck I would turn them down for sure.</p></blockquote><p></p>
[QUOTE="el matador, post: 1118610, member: 12193"] Depending on your chamber this might not be good. My 300 WMs are measuring .340-.341" on fired brass. SAAMI min chamber dimension is .3407". So if you have a SAAMI min chamber and ammo that's .340" at the neck you've got less than .001" clearance in there. That could create pressure problems. Hopefully you have a piece of fired brass you can measure and hopefully you are a little over SAAMI min. .002 to .005" clearance is ideal. Most factory rifles will be over the SAAMI min by several thousandths and you'll be fine. Higher end or custom guns will often be very close to the minimum chamber dimensions. If your fired cases are less than .342 at the top of the neck I would turn them down for sure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
what is your outside neck diameter 300 WM
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