.40
I am a fairly big guy. 6' 3", 260lbs. I like my .40s, but truely they are a little snappy, even for me. As big as I am, you guys will laugh, but I much prefer a 9mm. Much better shot placement, and follow-up shot for me.
That being said, my favorite .40 is a Sig 2340. It never skips a beat. It will eat any ammo you throw at it. Round nose, flat nose, the bluntest of blunt hollow points, does not matter.
I own six different automatics, and the only one that comes close to accuracy is a Turk made Beretta 92F in 9mm. (actually the Turk Beretta is a little more accurate, but it is 9mm)
For .40, from what I have shot...the SigArms 2340!!
Gunner