when working up new loads , I was at the high end and was increasing by .2 of a gr. my jump from 66.2 grains to 66.4 showed my average fps drop by 30. the chrono doesn"t lie. the rifle is a model 70 win in 264 win mag. it has happened before. Anyone have an answer.
Last edited by RICHCAS; 11-26-2011 at 03:30 AM.
Reason: to clarify