Maybe it isn't common knowledge, but cops were carrying .41 and .44 mags way before "Dirty Harry". A few departments in AZ and TX issued or authorized the .41 mag, and Detroit, MI used to let officers use anything they wanted to and qualified with for several years, and some carried the .44 mag. I carried a .44 mag for a limited time off duty, and on a few plainclothes assignments while on a small department in Ohio in the 70's, but my load was a medium one with a 240gr JHP at 900fps. I just had to register it and qaulify with it. This was before all the hoopla about HAVING to use factory ammo (mostly fabricated by "experts"). I'm sure there were quite a few acorss the US carrying the big magnums, with Special and Mag ammo. It's a personal thing. Carry a 9mm and be prepared to keep shooting the bad guy until he stops (is that curel and unusual punishment?), or shoot them once, or twice, with a big gun...........