I carry my pistol because of yotes that kill the fawns and deer @ my place. The FNL 5.57 is a very fast, long distance and flat shooting bullet, and gives me the distance I might need. And a couple of years ago I found cougar tracks one of my wildlife food plots and I have a picture (from a game camera) of a doe that looked to have been attacked from what I thought was this cougar. I also carry because I hate the Western Water Moccasin's that live @ my place. They have a very bad attitude so I want to be on equal ground with them.
Something extraordinary would have to occurred for a doe to escape from a cougar. I would liken that matchup to that of a semi versus a bicycle. lol
FnH's Five-SeveN pistol is indeed a multi-purpose pistol. It does well at distance due to the flat trajectory of the 5.7x28mm round, while the low recoil and muzzle flip allow for quick and accurate follow-up shots. The "stock ammo" does well, but there are many bullets between 27-50gr that can be loaded to really fine-tune and expand what this pistol can do.
