Quote:
Originally Posted by Bushleague
I don't have a chronograph, but for what its worth I have on several occasions had my POI change by a couple inches at 100 yards when switching between boxes of identical Remington ammunition. To me that indicates a fairly noticeable velocity change, though I don't have the means of verifying this. This variation was from box to box, not round to round.
I have never witnessed the same thing with Federal or Winchester brand ammunition. For what its worth.
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Box to box is not the same as round to round. Different boxes, may be from different lot numbers, the lot number is usually stamped somewhere on the box. All ammunition in the same box, should be from the same lot number. The variation from lot to lot usually isn't great, but I have seen significant differences in some cases, which is why I would purchase several boxes from the same lot number, if I was to use factory ammunition.