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Rifles, Reloading, Optics, Equipment
Reloading
Is it possible that the ogive could vary .030" on different lots of Bergers?
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<blockquote data-quote="Pdvdh" data-source="post: 432605" data-attributes="member: 4191"><p>Chris,</p><p></p><p>I'll check what Hornady calls their tool on the Hornady packaging, and then add to this post when I get home this evening. I'll also take some inside diameter measurements on my bushings also, and see how they compare to bore diameter. They should be smaller than bore diameter, because rifling to rifling diameter is smaller than groove to groove diameter.</p><p></p><p>For example, on a .308 Winchester or 300 Win Mag barrel, the bore dimension from groove to groove will be very close to 0.308". I believe the land to land measurement across the bore will be very close to 0.300 inches on most rifled barrels. </p><p></p><p>0.300" is the size bushing that Redding sends out with their comparator tool for .308 caliber rifles. I expect my Hornady tool bushing for .308 caliber bullets will also be very close to 0.300 inches inside diameter, so as to contact the .308 bullets at the location where the bullet will first contact the bore cross-section at the end of the chamber throat. Which would be the rifling land to rifling land diameter.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 432605, member: 4191"] Chris, I'll check what Hornady calls their tool on the Hornady packaging, and then add to this post when I get home this evening. I'll also take some inside diameter measurements on my bushings also, and see how they compare to bore diameter. They should be smaller than bore diameter, because rifling to rifling diameter is smaller than groove to groove diameter. For example, on a .308 Winchester or 300 Win Mag barrel, the bore dimension from groove to groove will be very close to 0.308". I believe the land to land measurement across the bore will be very close to 0.300 inches on most rifled barrels. 0.300" is the size bushing that Redding sends out with their comparator tool for .308 caliber rifles. I expect my Hornady tool bushing for .308 caliber bullets will also be very close to 0.300 inches inside diameter, so as to contact the .308 bullets at the location where the bullet will first contact the bore cross-section at the end of the chamber throat. Which would be the rifling land to rifling land diameter. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is it possible that the ogive could vary .030" on different lots of Bergers?
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