Ive just ran 10 brands thru the chrono
high of 1650 low of 585
Within the same brands, or across brands (countries)?
It's pretty well-known that the rounds vary by country/year/brand, as the round has a commercial loading, military loading, hot loading, and a machine-gun loading, although I doubt you had any of that. If it was within the same brand, box, or can, then you have a point.