The gap from the weakest or strongest vial to the average is only about 5 percent, so nothing to be concerned about. Use the average in a reverse calculator along with the round unit count you want to inject each time, then reconstitute using whatever bac volume the calculator returns.
Got this sixty milligram set back from testing and the weights read out as those six figures. Never run into variation this wide before so it's throwing me off. I normally just total the numbers and pick the middle one to move forward but the low to high spread here stands out more than usual. Feeding the top and bottom into the tool for a fifteen milligram target only shifts things by a couple units either way. Leaning toward the middle figure could work out fine. Over a year and a half into this whole thing without running into tough reactions yet I still prefer the numbers to line up precisely.