Of course Frank is right... and Your barrel is well within manufacturing specifications, and not oversize.
... How do I know? The barrel blueprints specifies the "standard" as 8.85mm and 8.83mm falls withing the tolerance for that measurement.
This is another shameless plug for the Luger Blueprint CD which is available for purchase in the FOR SALE forum. Until the 30th of this month it is being discounted to only $20.00 (regular price is $25.00) for purchase within the USA. See the For Sale forum for more details.
Here is a sample portion of the barrel blueprint showing standard 9mm bore dimensions:
