Quote:
Originally Posted by hdwhit
Did you weigh the bullets before loading them to verify that they were both the same weight?
Just because they are both in the 158 grain class doesn't mean they both weighed exactly 158.0 grains and if one type was even a couple grains heavier than the other, that would be sufficient to explain the difference.
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Not likely. Measure the actual bearing surface, has far more affect than even oal.
I just ran some liars using bayou 145gr RN 9mm. My std competition bullet is a 146gr RN. The bayou has no lube groove, solid shank. I get the same vel as the heavier bullet, both Hi-tell costed, same oal, but the bayou takes 3/10gr less powder to get there. The solid shank s offer far more bearing surface, higher vel.