Careful of both the copier and your printer.
I've had printers and copiers that did not print/copy evenly on the H and V axis. The ring was a slightly squashed circle, not a true round circle.
I discovered this by accident when I printed on a clear plastic and rotated it 90 degrees and found that the rings did not match the target.
After you print or copy, measure the diameter on the H and V axis and compare.
If they match or are close, you are good.
If they are significantly off...find another printer/copier to use.