Thread: Acceptable variation in powder charge

I remember reading an article quite a few years ago written by someone in the benchrest fraternity. It was about variations in ammunition which can happen during the reloading process and what affect on accuracy those variations might have. they covered things like concentricity, primer pocket uniformity, Neck turning, bullet seating, powder charge variations, etc. the finding from this was that small variations in powder charge was one of the lesser factors to affect accuracy. No surprise that the bench rest guys generally use powder throwers and do not weigh their charges. Admittedly they do use some quite fancy powder throwers. So I would say that if you are getting down around 1/10 to 2/10ths of a grain variation in charge you are doing well and this should be just fine, particularly in a large case and large powder charge in a 7mm RM