[cbonfi1]

Hi All,

I have some Winchester brand Q3130 7.62 NATO that I ordered. I ordered 3 cases and the rounds are packed in the standard 20 round boxes with the styrofoam insert, 10 boxes per case. Each case has a separate LOT number and almost all headstamps are 2013, except there is an occasional 2012 headstamp mixed in. I'm a little confused, don't the rounds with different dates on the headstamps have to come from different LOT numbers?

Also, what has been your experience when switching from one LOT to another with regards to point of impact? Should I expect the zero to change on my M1A when I finish one case and move to the next with a different LOT number? If so, how drastic has the POI changed in your experience?

Thank you for any information and happy shooting all!

 

[CaptainGyro]

I have no special knowledge of the ammunition manufacturing process, but it would not seem unreasonable to assume that, when manufacturing a certain lot of ammo, the factory would use their oldest inventory first. So, if you're firing up the line to produce 7.62, you dump the last of the 2012 brass into the hoppers, and then start dumping the 2013 stuff in. Same lot, different headstamps.

It just so happens that brass is the only one of the four components that we can identify by manufacture date. It wouldn't surprise me at all to learn that primers, bullets, and propellants from different lots are combined into a single lot of finished ammo. It's an interesting question.