Using the word "KABOOM" usually means to experienced shooters that the gun was destroyed. As best I can tell from your post that's not what happened. Do you mean the load was producing heavy recoil? You might be surprised that some people are less recoil sensitive than others. Also shooters can learn to handle recoil better. The first time I fired a 44 Magnum I used factory ammo in a Ruger Super Blackhawk and I was stunned! I eventually got used to the recoil and also got better at managing it.

I had a similar experience when I first shot my S&W 500 magnum. I'm not sure I'm used to it yet.

__________________
Bob.
SWCA 1821