I'm not sure the 357 is in the "hand cannon" category, but I'm happy to see you're enjoying a new category.
Don't even bother trying to chase down bigger rounds, though, because I can pull out my 44 Magnum and someone will pull out a 460 beside me, and someone will pull out a 500 beside him, etc.
If you're happy with it, there's no reason to go bigger (although a 44 Special feels just like a 357 Magnum out of a 44 Magnum, but that's a different conversation).
What length barrel is that, by the way? I don't personally care, but you may want to be careful with posting pictures of loaded restricted/prohibited firearms.
I trust you and believe you that you were being safe, but you don't want some troll reporting you because he's a d!ck.