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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The PRC die "problem"
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<blockquote data-quote="Alex Wheeler" data-source="post: 2026606" data-attributes="member: 101859"><p>There are a number of people experiencing sizing issues with the PRC case. When designing a chamber, brass, and resize die there is no one size fits all. We want good hard case brass, but its harder to size. We dont want sloppy chambers either. I have experience with designing reamers with hard brass and in my opinion the PRC base diameter is just too small to work. The die specs are not the main problem. You cant make a die much smaller than the solid web without it cracking. And once a case head expands a little no die can fix the clickers that you will get.</p><p></p><p>Looking at the 300 PRC and ADG brass there is only .003-.0035" difference between a virgin case head and the chamber. Thats not enough for this type of brass in a magnum case head. And will lead to long term problems.</p><p></p><p>I already have reamers spec'd out for myself with other changes, but I have spec'd new ones and will post the prints here with the only change being to the base size. That in my opinion should have been the Saami spec to begin with. They should solve most all of your sizing issues. The dies still needs to measure .5295"-.530" at the base though. Many are polished out.</p></blockquote><p></p>
[QUOTE="Alex Wheeler, post: 2026606, member: 101859"] There are a number of people experiencing sizing issues with the PRC case. When designing a chamber, brass, and resize die there is no one size fits all. We want good hard case brass, but its harder to size. We dont want sloppy chambers either. I have experience with designing reamers with hard brass and in my opinion the PRC base diameter is just too small to work. The die specs are not the main problem. You cant make a die much smaller than the solid web without it cracking. And once a case head expands a little no die can fix the clickers that you will get. Looking at the 300 PRC and ADG brass there is only .003-.0035" difference between a virgin case head and the chamber. Thats not enough for this type of brass in a magnum case head. And will lead to long term problems. I already have reamers spec'd out for myself with other changes, but I have spec'd new ones and will post the prints here with the only change being to the base size. That in my opinion should have been the Saami spec to begin with. They should solve most all of your sizing issues. The dies still needs to measure .5295"-.530" at the base though. Many are polished out. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The PRC die "problem"
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