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Rifles, Reloading, Optics, Equipment
Reloading
Excessive bullet run out. How to remedy?
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<blockquote data-quote="Goofycat" data-source="post: 671740" data-attributes="member: 6504"><p>Mag Man: I have never used a concentricity gauge before, so I checked out the current Sinclair catalog and found that they sell the Hornady and their own Sinclair gauge.</p><p></p><p>The Sinclair gauge allows the cartridge to rest on two ball bearings, which seems to me a design that might introduce error if the gauge is to be used mainly to check bullet runout. It seems to me that if there are sources of runout problems due to a case not being concentric, that any excessive bullet runout numbers might be due, in fact, to bad cases. I may be wrong here.</p><p></p><p>Conversely, the Hornady gauge seems to grab the case at its base, with no contact on the case by ball bearings. This seems to be a better way to find bullet runout because it removes the possibility of getting bad readings at the bullet end of the cartridge if the case is the culprit. </p><p></p><p>Therefore....it seems that the Hornady gauge would tend to eliminate error because there is no ball bearing contact with the case. When I read the description of the Hornady gauge, the catalog states,</p><p> </p><p> "The Hornady Lock-N-Load Ammo Concentricity Tool enables the hand loader to identify the bullet runout of each cartridge, and then eliminate it. Once a loaded round is inserted into the (tool), the dial indicator us used to adjust the cartridge runout to zero..."</p><p></p><p>My question: How can runout be eliminated by the gauge? It seems that once runout is present that either the die or bullet (or both) is the source of any runout, and that nothing can be done, short of (1) tossing out the old die and replacing it with one that produces concentric cases, or (2) using a different batch of bullets that don't show excessive runout.</p><p></p><p>Maybe I am making things too complicated, but before I plunk out $100 for the Hornady, I sure would like some answers. I haven't called Hornady or Sinclair yet and would rather rely on you guys.</p></blockquote><p></p>
[QUOTE="Goofycat, post: 671740, member: 6504"] Mag Man: I have never used a concentricity gauge before, so I checked out the current Sinclair catalog and found that they sell the Hornady and their own Sinclair gauge. The Sinclair gauge allows the cartridge to rest on two ball bearings, which seems to me a design that might introduce error if the gauge is to be used mainly to check bullet runout. It seems to me that if there are sources of runout problems due to a case not being concentric, that any excessive bullet runout numbers might be due, in fact, to bad cases. I may be wrong here. Conversely, the Hornady gauge seems to grab the case at its base, with no contact on the case by ball bearings. This seems to be a better way to find bullet runout because it removes the possibility of getting bad readings at the bullet end of the cartridge if the case is the culprit. Therefore....it seems that the Hornady gauge would tend to eliminate error because there is no ball bearing contact with the case. When I read the description of the Hornady gauge, the catalog states, "The Hornady Lock-N-Load Ammo Concentricity Tool enables the hand loader to identify the bullet runout of each cartridge, and then eliminate it. Once a loaded round is inserted into the (tool), the dial indicator us used to adjust the cartridge runout to zero..." My question: How can runout be eliminated by the gauge? It seems that once runout is present that either the die or bullet (or both) is the source of any runout, and that nothing can be done, short of (1) tossing out the old die and replacing it with one that produces concentric cases, or (2) using a different batch of bullets that don't show excessive runout. Maybe I am making things too complicated, but before I plunk out $100 for the Hornady, I sure would like some answers. I haven't called Hornady or Sinclair yet and would rather rely on you guys. [/QUOTE]
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Reloading
Excessive bullet run out. How to remedy?
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