I had a tap that just barely cut into the case, came out nice. Could not tell from the outside anything happened.
That was back when i threw charges into my rifles (now i tricle them all), and would load up 100's of bullets. Was getting them locally from some off brand for about 100 per 2000. Bought 5 2000 pks and 300 pieces of brass. Lesson learned, brass needs retired after lots of high pressure loads. Take the time to inspect cases, Powder throw needs to be tightened and checked every once in a while to make sure it has not opened up.
Now i only shoot rifles that would get under 50 rounds per range trip. Allows me to take my sweet time and trickle using my old beam balance