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Rifles, Reloading, Optics, Equipment
Reloading
Magnum or standard primers.
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<blockquote data-quote="MagnumManiac" data-source="post: 1980466" data-attributes="member: 10755"><p>The rules of thumb established 70 years ago have mostly gone the way of the dodo.</p><p>Long necks help accuracy...nope.</p><p>Magnum primers for ball powders...nope.</p><p>Double base powders increase pressures differently to single base powders with primer change...yes, but not catastrophically. My pressure trace says so. Even some single base powders behave erratically if a hotter primer or colder primer is used.</p><p>Winchester primers are the hottest on the market, even hotter than Federal 215's.</p><p>So, use Winchester primers, either WLR or WLRM if hunting/shooting in the extreme cold.</p><p>Experiment, let the load tell you what primer it likes. Magnum primers do not always increase ES/SD numbers, not saying it doesn't happen, but you won't know until you try it.</p><p>Everyone and, I mean everyone, is biased.</p><p>I do not use CCI primers because ONE TIME I had hang fires with H4350 in a 300WM.</p><p>Just can't bring myself to buy them again and, this occurred 30+ years ago now.</p><p><img class="smilie smilie--emoji" loading="lazy" alt="😇" title="Smiling face with halo :innocent:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f607.png" data-shortname=":innocent:" /></p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1980466, member: 10755"] The rules of thumb established 70 years ago have mostly gone the way of the dodo. Long necks help accuracy...nope. Magnum primers for ball powders...nope. Double base powders increase pressures differently to single base powders with primer change...yes, but not catastrophically. My pressure trace says so. Even some single base powders behave erratically if a hotter primer or colder primer is used. Winchester primers are the hottest on the market, even hotter than Federal 215’s. So, use Winchester primers, either WLR or WLRM if hunting/shooting in the extreme cold. Experiment, let the load tell you what primer it likes. Magnum primers do not always increase ES/SD numbers, not saying it doesn’t happen, but you won’t know until you try it. Everyone and, I mean everyone, is biased. I do not use CCI primers because ONE TIME I had hang fires with H4350 in a 300WM. Just can’t bring myself to buy them again and, this occurred 30+ years ago now. 😇 Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Magnum or standard primers.
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