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Rifles, Reloading, Optics, Equipment
Reloading
Excessive bullet run out. How to remedy?
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<blockquote data-quote="Trickymissfit" data-source="post: 671914" data-attributes="member: 25383"><p>I own a Neco and someother case gauges. I like the Neco better than most another I've seen on the market these days. The Neco uses a much (and I mean VERY) better indicator setup than the others do. Nothing moves during the check except for the case and the indicator wand. If a part moves you also pick up error in that movement, so keep that in mind. The ball bearing vee block affair that one of them uses is not known as a precision ball bearing vee block. They do make precision ball bearing vee blocks that will cost you about $50 a piece, so your getting what you paid for there. I'm not inlove with the Neco vee block system as well (wear), but at least it stays put. The ones that come with the long travel indicators are a system looking for a place to screw up. The indicators usually have about 10% backlash (ChiComs are worse), and their accuracey is very dependent on the tip being almost perfectly tangent with the O.D. it's riding against. They also have a little bit of slop in the guide bearing for the stem. None of this is at all good for precision measurments. They do make long travel indicators that have about 3% backlash in them (jewelled), but usually have a much shorter travel and cost about fives times more. Where as a typical wand type indicator will have about 1% lag. (a Best Test or Interrapid will be zero lag)</p><p> </p><p>I would put a .001" or a .0005" dial indicator on the backside of the rotating plate of the press and measure the flex when full length sizing a case. .002" will give you about .004" runout. There might be a way to tighten up the indexing plate, and would be worth the time ( a common issue with all turret presses). I would believe that the OP's issues start with the full length sizing operation and not is the bullet seating operation as the bullet will always seek the path of least resistence in seating. </p><p> </p><p>Assuming your die is located in the proper place for the proper headspace, then full length size a case with the jam nut slightly loose. With the case fully inside the die tighten the jam nut. Then size another case to see if that helps. Secondly wipe the base of the case on a smooth india stone to make sure there are no hickeys and bumps in it from the extractor or manufacturing (common issue). The shell holder can be an issue as well (I hate them). See if you can stone a couple thousandths off the part that contacts the shell holder so it will not be held down tight. Then all you will use it for is case extraction (lets hope they machined it parallel). And while fooling around in that area take a small slip stone and stone the area the shell holders seats on (look for burrs). One thousand here will cause you a lot of grief after the error triangulates out the length of the case.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 671914, member: 25383"] I own a Neco and someother case gauges. I like the Neco better than most another I've seen on the market these days. The Neco uses a much (and I mean VERY) better indicator setup than the others do. Nothing moves during the check except for the case and the indicator wand. If a part moves you also pick up error in that movement, so keep that in mind. The ball bearing vee block affair that one of them uses is not known as a precision ball bearing vee block. They do make precision ball bearing vee blocks that will cost you about $50 a piece, so your getting what you paid for there. I'm not inlove with the Neco vee block system as well (wear), but at least it stays put. The ones that come with the long travel indicators are a system looking for a place to screw up. The indicators usually have about 10% backlash (ChiComs are worse), and their accuracey is very dependent on the tip being almost perfectly tangent with the O.D. it's riding against. They also have a little bit of slop in the guide bearing for the stem. None of this is at all good for precision measurments. They do make long travel indicators that have about 3% backlash in them (jewelled), but usually have a much shorter travel and cost about fives times more. Where as a typical wand type indicator will have about 1% lag. (a Best Test or Interrapid will be zero lag) I would put a .001" or a .0005" dial indicator on the backside of the rotating plate of the press and measure the flex when full length sizing a case. .002" will give you about .004" runout. There might be a way to tighten up the indexing plate, and would be worth the time ( a common issue with all turret presses). I would believe that the OP's issues start with the full length sizing operation and not is the bullet seating operation as the bullet will always seek the path of least resistence in seating. Assuming your die is located in the proper place for the proper headspace, then full length size a case with the jam nut slightly loose. With the case fully inside the die tighten the jam nut. Then size another case to see if that helps. Secondly wipe the base of the case on a smooth india stone to make sure there are no hickeys and bumps in it from the extractor or manufacturing (common issue). The shell holder can be an issue as well (I hate them). See if you can stone a couple thousandths off the part that contacts the shell holder so it will not be held down tight. Then all you will use it for is case extraction (lets hope they machined it parallel). And while fooling around in that area take a small slip stone and stone the area the shell holders seats on (look for burrs). One thousand here will cause you a lot of grief after the error triangulates out the length of the case. gary [/QUOTE]
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Excessive bullet run out. How to remedy?
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