I’ve always been a cautious hand loader. Working to max loads and over very slowly and carefully. And I sure don’t share that load data with anyone because I’m worried some idiot will just try it right off the bat, blow their hand off and blame me. I have had one or two primers that blew out when shooting other people’s handloads. One in a wildcat .17 centerfire round. There is no room for error when working with .17 caliber centefire rounds. In this case it was the .17 BK.
That is a .357 Maximum case necked down to .17 caliber and used in a single shot rifle made from a Martini Cadet. Velocities exceed 4,200 and yes it is as big a pain in the ass to make as you think.
The other time was shooting a .41mm Swiss. I got powder burns on my forehead from that one. Again, not from my handloads. The other was from another guy’s .17 Remington handload. Face full of gas on that one. Very scary but it can happen in factory loads. My Dad had a 7mm Remington Mag factory round let go on him long ago. You just never know with factory ammo, you take it on faith.