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Posted: 7/9/2008 12:09:03 PM EDT
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So ... not really trusting my old dial caliper, I picked up a digital gauge caliper. According to my new digital caliper, my OAL for .308 is 2.760" How much of a problem is this going to be when Lee reloading manual looks for 2.800" min oal? This will be shot out of a Remington 700 150gn Hornady FMJBT .308 44.6gm Varget Win Primer Mixed Brass 2.760 OAL Thanks -Carlo |
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Probably no problem with that charge weight; it's a little over Hodgon's recommended starting charge with that weight bullet, and well below max. Both calipers are suspect until they've been calibrated with a standard. The digital caliper's advantage is reading ease, and it's more likely to be inaccurate than a quality dial caliper that's had good care. One of the reasons for load work up is to permit incorporation of minor deviations from the load manuals. A common example is from seating cannelured bullets. The cannelures may not be at the same location from lot to lot from one manufacturer, and another maker might put his cannelures at another location altogether. I can easily find other "recipes" for this cartridge that specify a shorter cartridge overall length with heavier bullets. The reason might be caused by blunt bullet design, so this is one of the details to check, but on the other hand the bullet could just as well be a similar spitzer shape. |
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