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Rifles, Reloading, Optics, Equipment
Reloading
PPU brass
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<blockquote data-quote="MNbogboy" data-source="post: 1730252" data-attributes="member: 18849"><p>A simple method to compare & measure base to shoulder is use a small socket as a case comparator that just fits over the neck. Before & after sizing will probably show you longer after sizing. I've ran into that several times with "minimum length" chambers. Possibility is die/shell holder mfg. mismatch. If you have access to another shell holder with less height from cartridge base to top that might give you what you need. I've taken them down with a surface grinder and also with emery paper on a glass base. You can also remove it from the bottom of the die.</p><p>I believe the "softness" of the PPU brass is allowing the growth without enough "springback" that other brands you have tried. And the ruger chamber is probably has diameters towards the outside of tolerance creating the extra "squeeze" length. How do diameter measurements stack up against brass fired in other chambers?</p><p>I do recommend a good shoulder/neck anneal after the die length problem is cured if that's what it turns out to be.</p><p>Trimming the die or shell holder is usually a good thing anyway to allow adjustability for all brands & condition of brass in any "tight" chamber to prevent heavily loaded cam-over. Looser/longer chambers don't present this problem as die never touches shell holder. Too bad that instructions with dies often send people down a murky path.</p><p>I've had trouble with a few savages that were easier to re-headspace but with the ruger it might require setting it back and re-chambering. That might not make a lot of sense with over 1200 rounds already. I certainly wouldn't run any of my reamers back in a barrel with that many rounds!</p><p>Hope you get it figured out.</p><p>Randy</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 1730252, member: 18849"] A simple method to compare & measure base to shoulder is use a small socket as a case comparator that just fits over the neck. Before & after sizing will probably show you longer after sizing. I've ran into that several times with "minimum length" chambers. Possibility is die/shell holder mfg. mismatch. If you have access to another shell holder with less height from cartridge base to top that might give you what you need. I've taken them down with a surface grinder and also with emery paper on a glass base. You can also remove it from the bottom of the die. I believe the "softness" of the PPU brass is allowing the growth without enough "springback" that other brands you have tried. And the ruger chamber is probably has diameters towards the outside of tolerance creating the extra "squeeze" length. How do diameter measurements stack up against brass fired in other chambers? I do recommend a good shoulder/neck anneal after the die length problem is cured if that's what it turns out to be. Trimming the die or shell holder is usually a good thing anyway to allow adjustability for all brands & condition of brass in any "tight" chamber to prevent heavily loaded cam-over. Looser/longer chambers don't present this problem as die never touches shell holder. Too bad that instructions with dies often send people down a murky path. I've had trouble with a few savages that were easier to re-headspace but with the ruger it might require setting it back and re-chambering. That might not make a lot of sense with over 1200 rounds already. I certainly wouldn't run any of my reamers back in a barrel with that many rounds! Hope you get it figured out. Randy [/QUOTE]
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