It is not unusual to find all sorts of issues with packaged bullets.
A target shooting bud of mine weighs all his Sierra Match king bullets. He said he has run across too many match bullets that were not correct weight, like 168 grain bullets that weighed 150 grains or less. He claims the lead cores were off. I think he may have found 190's in a 168 grain box.
For him, it is not worth the gas money, match fees, and all the rest, to have his score ruined by an off weight bullet.
I have had a fuzzy memory of finding the wrong bullet in a package of match bullets, but overall, I am too lazy to weight sort bullets.
If I'm not shooting, I'm reloading.