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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The PRC die "problem"
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<blockquote data-quote="garyatlp" data-source="post: 2711070" data-attributes="member: 91236"><p>I recently purchased a supposedly new Bergara Ridgeback that I'm guessing is a few years old simply based on it having a .130 throat unless they're all chambered the same. The chamber neck is also tight as a bullet isn't loose in a fired case neck (which is why I went online to see what I could find out about it and found this thread which is the first I've heard of the resizing problem). I haven't been able to locate a print for the original .130 throat so I could compare chamber neck size between it and the saami specs. A pressure sign I'm having is case expansion above the extractor groove, .0015"-.002", I've always loaded to never have more than .0005" expansion here. Bolt lift is normal. I believe I'll end up buying a tool to turn the necks down and recheck case expansion. I'm using the Norma 143 gt loaded ammo because I found it cheaper than I could find brass for. Here's the specs for the Norma ammo if anyone is interested. It may be brass that has no sizing/bolt click problems. I've heard over the years it's softer so maybe less springback upon sizing.</p><p>Web = .529" Case length = 2.022" OAL = 2.845" (.133" jump in this Bergaras throat)</p><p>Neck thickness = .0145" Bullet diameter = .264" length = 1.455" Powder = 55.3 grains (MRP?) </p><p>Accuracy without the best gun rest was .7" and 1" 5 shot groups at 100yds.</p><p>I can check back in after a few reloads but that won't be for a few months.</p></blockquote><p></p>
[QUOTE="garyatlp, post: 2711070, member: 91236"] I recently purchased a supposedly new Bergara Ridgeback that I'm guessing is a few years old simply based on it having a .130 throat unless they're all chambered the same. The chamber neck is also tight as a bullet isn't loose in a fired case neck (which is why I went online to see what I could find out about it and found this thread which is the first I've heard of the resizing problem). I haven't been able to locate a print for the original .130 throat so I could compare chamber neck size between it and the saami specs. A pressure sign I'm having is case expansion above the extractor groove, .0015"-.002", I've always loaded to never have more than .0005" expansion here. Bolt lift is normal. I believe I'll end up buying a tool to turn the necks down and recheck case expansion. I'm using the Norma 143 gt loaded ammo because I found it cheaper than I could find brass for. Here's the specs for the Norma ammo if anyone is interested. It may be brass that has no sizing/bolt click problems. I've heard over the years it's softer so maybe less springback upon sizing. Web = .529" Case length = 2.022" OAL = 2.845" (.133" jump in this Bergaras throat) Neck thickness = .0145" Bullet diameter = .264" length = 1.455" Powder = 55.3 grains (MRP?) Accuracy without the best gun rest was .7" and 1" 5 shot groups at 100yds. I can check back in after a few reloads but that won't be for a few months. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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The PRC die "problem"
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