We are frequently cautioned that smokeless powder varies from production lot to lot and one should "work up" a load with every purchase. We are told that powder changes with age. And further, the distributors (Hodgdon and Accurate, I am looking at you) will change the source of a given powder without notice; same name, different raw materials, different factory. I thought that surely the stuff was more consistent than to warrant all this angst, but then the back of the shelf gave me a chance to check it out. I have two partial containers of Hodgdon's H322; one with fine print "Made in Scotland," the other "Made in Australia." So I loaded up some ammo with each; .223, 50 gr SP, 22.8 gr H322, a 95% load from the Hodgdon www. Same bag of WW .223 brass, same flat of CCI BR4 primers, same box of 50 gr Remington soft points. Kind of a third tier bullet, but it was the last of that box, so I used them up in the name of science, not expecting really fine accuracy. I shot some hardball to get on the paper, then a couple of H322 rounds as fouling shots, then tediously aligned the chronograph with the target. (A great advertisement for Labradar, if I were doing a lot of this.) H322 Scotland - average velocity of ten - 2946 fps H322 Australia - average velocity of ten - 2877 fps Difference of 69 fps, 2.4%. I didn't expect great accuracy and I didn't get it but there was no real difference, 1.15" best of 4 five shot groups, other three right at 1.21".