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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Flattened primer question
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<blockquote data-quote="Mark_in_utah" data-source="post: 28510" data-attributes="member: 1503"><p>I can understand your concerns for flattening the primers as being the first indication of overpressure, but it's important to note what a flattened primer looks like.</p><p></p><p>If the eddge of the primer is rounded down as it dips into the primer pocket, the primer isn't "flattened". It's natural for most all of the primer to be pushed back against the bolt. You expect that. You only need to be worried if the primer is COMPLETELY mashed back against the bolt with sharp edges.</p><p></p><p>My gunsmith doesn't look for a flattened primer as a pressure sign. He looks for a stiff bolt or a pierced primer.</p><p></p><p>I've been working up some loads for my .338 RUM, and so far I haven't found a top-end! I run out of space before the pressure goes too high on WC872, which is similar to H870. 103 grains is pretty much a compressed load. WC852 (4831) works good and so far I'm up to 93 grains behind a 250 grain Gameking. 3077 fps. I could probably fit 100 grains in the bottle, which would get me up around 3200 fps.</p><p></p><p>Mark in Utah</p></blockquote><p></p>
[QUOTE="Mark_in_utah, post: 28510, member: 1503"] I can understand your concerns for flattening the primers as being the first indication of overpressure, but it's important to note what a flattened primer looks like. If the eddge of the primer is rounded down as it dips into the primer pocket, the primer isn't "flattened". It's natural for most all of the primer to be pushed back against the bolt. You expect that. You only need to be worried if the primer is COMPLETELY mashed back against the bolt with sharp edges. My gunsmith doesn't look for a flattened primer as a pressure sign. He looks for a stiff bolt or a pierced primer. I've been working up some loads for my .338 RUM, and so far I haven't found a top-end! I run out of space before the pressure goes too high on WC872, which is similar to H870. 103 grains is pretty much a compressed load. WC852 (4831) works good and so far I'm up to 93 grains behind a 250 grain Gameking. 3077 fps. I could probably fit 100 grains in the bottle, which would get me up around 3200 fps. Mark in Utah [/QUOTE]
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Flattened primer question
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