Its not like you bought several cases of this stuff... did you?
Just shoot it at the range for practice and see if you can tell a difference.
I put 200 rds of 147gr thru last week cause it was cheap and what I could get.
No problems... put holes in the target = fun hour or so at the range.
Stock the good ammo, practice with the rest imo.
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=== XRumer 5.0 Palladium RULEZ! ===