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Rifles, Reloading, Optics, Equipment
Reloading
rookie dealing with possible pressure signs
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<blockquote data-quote="SpikeSniper" data-source="post: 555415" data-attributes="member: 29703"><p>SB-</p><p>There is a similar thread on this page with a 30-378 cartridge. There are several possibilities, but I would be willing to bet that you made a very simple and common mistake when you begin reloading. It looks to me like the crater starts just above the shoulder junction. You may be getting too much lube on your cartridge, or your die vent may be clogged during resizing. This will create small dents in the slope of the shoulder, which will allow a seep in pressure from the chamber into action. Pressure theoretically should push the case out against the chamber and prevent this from happening when all is well. But if there is enough gap in headspace for one reason or another, the result will be blow by and a deformed case as you have. I have made this mistake myself starting out. Often, the shoulder will just appear slightly dimpled. Try cleaning your dies with a fast drying solvent like gun scrubber and blowing them dry. Then only apply enough lube to the case sides to keep them from sticking. If there is extra lube on the shoulder or neck after you pull it outdryer running a dry case through but don't force it or it will stick. If that's not it, try cleaning your chamber. Debris or moisture in the chamber could cause the same issue. Keep me updated.</p></blockquote><p></p>
[QUOTE="SpikeSniper, post: 555415, member: 29703"] SB- There is a similar thread on this page with a 30-378 cartridge. There are several possibilities, but I would be willing to bet that you made a very simple and common mistake when you begin reloading. It looks to me like the crater starts just above the shoulder junction. You may be getting too much lube on your cartridge, or your die vent may be clogged during resizing. This will create small dents in the slope of the shoulder, which will allow a seep in pressure from the chamber into action. Pressure theoretically should push the case out against the chamber and prevent this from happening when all is well. But if there is enough gap in headspace for one reason or another, the result will be blow by and a deformed case as you have. I have made this mistake myself starting out. Often, the shoulder will just appear slightly dimpled. Try cleaning your dies with a fast drying solvent like gun scrubber and blowing them dry. Then only apply enough lube to the case sides to keep them from sticking. If there is extra lube on the shoulder or neck after you pull it outdryer running a dry case through but don't force it or it will stick. If that's not it, try cleaning your chamber. Debris or moisture in the chamber could cause the same issue. Keep me updated. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
rookie dealing with possible pressure signs
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