I am new to reloading and I have noticed some small dents in my once fired brass. The dents are usually about midway up the case and they are not large dents. I think the dents are from the spent casings hitting the concrete pad or adjacent shooting benches at the range. I am shooting an M4 and a Mini 14. I know the Mini really chucks the casing out whereas the M4 is a bit gentler. I just want to make sure that reloading the casings with small dents is O.K. Thanks all.