Seems like the majority of people I've encountered think the .45 is a much better defensive caliber than anything smaller. However, about a week ago I encountered a group--a few LEO's, one NRA instructor, a few gun enthusiasts, and a former Marine/current gun shop owner--who said they favored 9mm's because:
- 9mm has "much" better penetration because of its much higher velocity. One said he'd heard of .45's not being able to penetrate car doors. (theboxotruth.com shows otherwise, but does show .45 going through about half as many phone books as 9mm.)
- 9mm causes "much" more devastation. Several said they'd shot cinder blocks, etc. and 9mm's would pulverize the blocks whereas .45's usually just took chunks out.
- 9mm is more accurate.
- Blackwater personnel prefer 9mm instead of .45.
- 9mm+P+ is about the same as .357 magnum (thanks to ammo improvements in the last 20 years). I told this to another gun shop guy--he thought it was a joke. 9mm is the same diameter as .357 though...
Other points they made (less recoil, cheaper ammo) I agree with. Then I've got a lot of anecdotes on the other side of the coin, including:
- 9mm's overpenetrate
- 9mm's do minimal damage. One gun shop guy related a story of cops dispatching a bear--one guy unloaded 9mm's causing minimal impact; another pulled out his .45 and put "big holes" in the bear, putting it down. (One of the former group called this BS.)
- The military hates 9mm and wants to (or is) switch to .45. Of course, they're allowed to only use FMJ.
- 9mm has "much" better penetration because of its much higher velocity. One said he'd heard of .45's not being able to penetrate car doors. (theboxotruth.com shows otherwise, but does show .45 going through about half as many phone books as 9mm.)
- 9mm causes "much" more devastation. Several said they'd shot cinder blocks, etc. and 9mm's would pulverize the blocks whereas .45's usually just took chunks out.
- 9mm is more accurate.
- Blackwater personnel prefer 9mm instead of .45.
- 9mm+P+ is about the same as .357 magnum (thanks to ammo improvements in the last 20 years). I told this to another gun shop guy--he thought it was a joke. 9mm is the same diameter as .357 though...
Other points they made (less recoil, cheaper ammo) I agree with. Then I've got a lot of anecdotes on the other side of the coin, including:
- 9mm's overpenetrate
- 9mm's do minimal damage. One gun shop guy related a story of cops dispatching a bear--one guy unloaded 9mm's causing minimal impact; another pulled out his .45 and put "big holes" in the bear, putting it down. (One of the former group called this BS.)
- The military hates 9mm and wants to (or is) switch to .45. Of course, they're allowed to only use FMJ.