kentucky37
New Member
I expect this doesn't really matter, but it is kinda bugging me. I am new to reloading and am working up a load for a 270Win with Nosler 140g Accubonds. I am using a neck expander mandrel and the imperial dry lube, which has got me thinking and reading this forum about neck tension. For some reason I measured some of the Accubonds with my calipers and kept getting .276. (I don't own a micrometer.) I thought my calipers must be off by .001, but I checked with Mitutoyo gage block, and they are right on the money. I measured my Bergers and Speers--both .277. I measured a few each of Nosler .243 bullets in 55g, 58g, and 90g, and two batches showed .242 and one .2425. I measured .243 Bergers and they were .243. Working up the load will tell me everything I need to know practically, but I am curious--is there any reason that I might want to know if a bullet runs .001 undersize? Or, though my results seem quite consistent, am I getting bad measurements for some reason that I can't see?