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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bad batch of Lapua Brass
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<blockquote data-quote="MagnumManiac" data-source="post: 975936" data-attributes="member: 10755"><p>Fireforming with a max load for a standard 243 chamber in an Ackley chamber SHOULD NOT produce any where near excessive pressures and enlarge primer pockets.</p><p>I cannot tell you HOW/WHY your cases have done this, but have you tried a different brand of primers to see if they fit a bit tighter?</p><p>I have a few improved cartridges, I moved away from fireforming with bullets a long time ago. I use a fast pistol powder (Clays), this normally almost fills the case and no 'filler' is required, a little tissue paper followed by a plug of soap, fire, and a case comes out nicely formed to the chamber. It takes a near full power load with a bullet to finish forming 100%, but has no effect on accuracy that I've ever seen. This method is better because you can fireform where ever you like and don't burn up barrel life. There is a reason that it is advised when fireforming with a bullet that use a milder load, it reduces excessive case stretching, my method eliminates this completely.</p><p>There is an underlying problem with your rifle, it could be many things, such as a too tight chamber or excessively tight neck, or the throat wasn't cut correctly.</p><p>Have your gunsmith check it out.</p><p></p><p>Cheers.</p><p>gun)</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 975936, member: 10755"] Fireforming with a max load for a standard 243 chamber in an Ackley chamber SHOULD NOT produce any where near excessive pressures and enlarge primer pockets. I cannot tell you HOW/WHY your cases have done this, but have you tried a different brand of primers to see if they fit a bit tighter? I have a few improved cartridges, I moved away from fireforming with bullets a long time ago. I use a fast pistol powder (Clays), this normally almost fills the case and no 'filler' is required, a little tissue paper followed by a plug of soap, fire, and a case comes out nicely formed to the chamber. It takes a near full power load with a bullet to finish forming 100%, but has no effect on accuracy that I've ever seen. This method is better because you can fireform where ever you like and don't burn up barrel life. There is a reason that it is advised when fireforming with a bullet that use a milder load, it reduces excessive case stretching, my method eliminates this completely. There is an underlying problem with your rifle, it could be many things, such as a too tight chamber or excessively tight neck, or the throat wasn't cut correctly. Have your gunsmith check it out. Cheers. gun) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Bad batch of Lapua Brass
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