JFrank
Member
HummLoading for .250 Savage using 115 grain Nosler Ballistic tips, redding seating die, and RCBS green press. I'm using calipers with a hollow anvil type setup to measure base to ogive length. This lot consists of 5 round groups all using full case prep, primer, powder load, bullet and walking the round back from the lands by ~.005" increments.
I'm finding that right at about 20% of the cartridges are coming in .005-.008" short. Let's say I'm loading a group that has a 2.053" base to ogive length. I'll get four that are pretty much dead on, but sure enough 1 will come out 2.046".
Maybe this indicates that 20% of the projectiles have subtly different geometries causing the ogive "ring" to be lower on the projectile. Or maybe it's me and I'm being inconsistent somehow with my loading technique. Have you seen this? What are your thoughts?
Oh well. Move on I suppose
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