Don't feel bad I had some crappy factory ammo do it to me during the shortage. Was some import from Russia in a blue box (forget the brand).
I have been blessed with feeding well and not overloading. But I have forgot to charge the case. Luckily the magnum primers pushed the round out!
Since then I charge 50 rounds and do a visual check before seating and crimping. Been good so far.
I've been reloading since the middle to late 1970s with a perfect record until I did this a few years ago.
WOW! Nothing like an uh oh to get the blood a pumping.