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Old January 11th, 2019, 09:00 AM #1
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Why COPS use .40: Q & A With a Cop

Very informative video on pistol ballistics and cartridges, and why the .40 took over. (From a Police perspective.)

I was a cop when the big shift to .40 occurred, and I carried that for a while until I moved to the .45 for a variety of reasons. I owned my own duty weapons...but, per policy, I HAD to carry deptartment issued ammunition.
Thankfully we were issued Speer Gold Dot, which I still think is a solid performer. Personally, now I prefer the 9mm and that's what I primarily carry - largely in part to the advances in modern ammunition. I carry Federal 124gr HST. I know a lot of local cops still carry Federal Hydrashoks... and as this guy mentioned...most of it is about policy, cost, contracts, etc. That's why I don't 100% agree with the adage that for self defense ammo, you should just carry what the local police carry because it's "defensible". I prefer to review ballistics testing and make my own decision, and that too is defensible. Anyway... here ya go.

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Old January 11th, 2019, 09:07 AM #2
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Many agencies are going back to 9MM. Baltimore County is going to G17s from FNs, MD Dept of Public Safety investigators went from G23s to G19s a couple years ago..I've heard every reason from cost savings to 9MM isn't as deadly to 9MM is more deadly for the change...
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Old January 11th, 2019, 09:12 AM #3
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My grandchildren will have to buy a C&R gun in order to shoot .40.
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Old January 11th, 2019, 09:20 AM #4
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I suspect the change is for one reason, and one reason only. It is not due to superior ballistics or advances in 9mm performance. Paul Harrel has a great video on Youtube in regard to the 9mm versus .40S&W.
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Old January 11th, 2019, 09:26 AM #5
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Quote:
Originally Posted by Capt Skup View Post
I suspect the change is for one reason, and one reason only. It is not due to superior ballistics or advances in 9mm performance. Paul Harrel has a great video on Youtube in regard to the 9mm versus .40S&W.
Can you post the video?
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Old January 11th, 2019, 09:33 AM #6
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I've heard, honestly, some agencies prefer 9mm because it's a lighter recoil and poor shooting officers have a better chance of successful qualifications. Agree or not, that's a factor in agency wide decision making.

I may be unique, but I always felt the recoil profile of the .40 was no worse, and maybe even preferable to me over the 9mm. It was more of a thud than a snap... And the .45 even moreso... But that was my experience about 20 years ago... I haven't tested it since. I'm a better shooter now than I was back then too.
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Old January 11th, 2019, 09:41 AM #7
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https://www.mdshooters.com/showpost....06&postcount=9

It's all the same. Basically a magazine of 9, 40, & 45 all destroy roughly the same volume of tissue, given a similar sized handgun. As you move from 9 to 45, you get more momentum(less deflection) and divide that total volume into fewer shots. You also get an increase in felt recoil and reduction in speed for most people. However, since a similar wound volume is given between the magazines, the speed issue should probably be looked at in terms of emptying the mag vs a shot to shot split, making up some ground for 45.
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Old January 11th, 2019, 09:43 AM #8
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I always find it interesting when people respond to a post including a video, yet they never watch the video. The discussion is mildly relevant, but clearly goes in a different direction when people don't actually review the content.
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Old January 11th, 2019, 09:45 AM #9
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This?

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Old January 11th, 2019, 09:48 AM #10
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40S&W is snapper than 9mm. That's a given. I have no problem with that. I like the caliber, .40, and hope it hangs in there. But, I converted the only pistol I have in .40 to 9mm.
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