hand cannon

Just ordered one , anybody shooting one, impressions discussion.

Mas I know your minimum cartridges for self defense are the 38 and 9mm. I know that the 50 AE, Smith 500, Smith 460, 454 Casull and 44 Magnum are hunting cartridges for the most part. But it raises a question for me: What would you consider the maximum without being excessive, or is there a...