I suspect a "case gague" would have caught that round ...allowing you to reject it - before you boxed it up.
I will occasionally have a case with a small crack or a bulge or a burr on the base...( sometimes a small crack will show up, after you seat the bullet )...and a case gague, is the way I check every round -as I box em up. It only takes about 1 minute per box ...for a little more piece of mind - and one last final check !
We all know the risks associated with reloading...and I don't think a mistake is inevitable / if you follow careful procedures, keep your bench clean - and keep your eyes and ears tuned to issues on your press.
It is possible to load for many years - without an overcharge or an undercharge ! ...and presses with powder check dies help us !