Did you use new brass or resized fired brass?
Are you using a bench-mounted press and dies or a handloader unit like the Lee Loader? If the Lee Loader, some minor bullet shaving is quite normal because there is no neck expanding stage.
If using a bench press and dies, it's important to use the expander ball during full-length resizing of the cases. It's nominally 0.307" diameter, but a slightly small expander combined with slightly oversized bullets can cause the bullet shaving you described. It's nothing to worry about unless you experience difficulty chambering your loaded cartridges.
HTH
John
