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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump problem? Not far enough?
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<blockquote data-quote="SidecarFlip" data-source="post: 866551" data-attributes="member: 39764"><p>You have another option, get an extended shell holder from RCBS or Precision reloading in your caliber. The extended shellholder will clearance into the chamfer on the die base allowing for lots of bump or more than you'll ever need.</p><p> </p><p>I myself jig all my FL resize dies upside down in a jig I made up that fits a R8 indexing fixture and I surface grind about 0.005 off the bottom of all my dies to allow for the bump, if I need it. Factory dies will all have at least a 1/16th inch 60 degree chamfer on the bottom for ease of entry of the to be sized brass so 5 thou or so is inconsequential far as sizing the case is concerned.</p><p> </p><p>That way, you don't have to crank the die down on the standard shellholder and/or cam over the ram. I'm not comfortable with an interfernece fit anyway. I load lots of straight wall cases and those dies can't comtact the shellholder. If they do, the brittle carbide insert breaks.</p><p> </p><p>I also use the headspace gage fron Hornady. Sound like a 0.001-0.0015 bump is all you need, attainable either will the extended shellholder and/or grinding the die base and you can grind the base on an abrasive belt if yoiu do it carefully and maintain squareness. Just be sure to measure the material removed from the base by measuring the overall length of the die as you grind the base away. A couple thou will do it. I do 5 thou as a standard so all dies are the same for my benefit.</p></blockquote><p></p>
[QUOTE="SidecarFlip, post: 866551, member: 39764"] You have another option, get an extended shell holder from RCBS or Precision reloading in your caliber. The extended shellholder will clearance into the chamfer on the die base allowing for lots of bump or more than you'll ever need. I myself jig all my FL resize dies upside down in a jig I made up that fits a R8 indexing fixture and I surface grind about 0.005 off the bottom of all my dies to allow for the bump, if I need it. Factory dies will all have at least a 1/16th inch 60 degree chamfer on the bottom for ease of entry of the to be sized brass so 5 thou or so is inconsequential far as sizing the case is concerned. That way, you don't have to crank the die down on the standard shellholder and/or cam over the ram. I'm not comfortable with an interfernece fit anyway. I load lots of straight wall cases and those dies can't comtact the shellholder. If they do, the brittle carbide insert breaks. I also use the headspace gage fron Hornady. Sound like a 0.001-0.0015 bump is all you need, attainable either will the extended shellholder and/or grinding the die base and you can grind the base on an abrasive belt if yoiu do it carefully and maintain squareness. Just be sure to measure the material removed from the base by measuring the overall length of the die as you grind the base away. A couple thou will do it. I do 5 thou as a standard so all dies are the same for my benefit. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump problem? Not far enough?
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