"Did you shoot a few to determine if the POI is the same?
Don't take the word of others as gospel. At least when yer shooting at game , paper that's another story."
That should be done any time you open a new box of ammo even if you know they're the same. Many guys will buy a few boxes of the same lot number that's on the inside of the end flap at one time just because they were made at the same time under the same conditions.