How do you track down specific Lots of ammo?

[speckdaddy]

Good Afternoon all,

This is my first post here and I've read many interesting articles so far that have been beneficial to me for my shooting. I've just purchased a brand new Sako rifle and was sighting it in. One box of the same ammo shot around a 1 inch group, the other box with a different lot shot a .192 " group.

I would like to know how to track down specific lots if possible, in order to purchase a few more boxes.

Thanks in advance.
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