The M&P is a really fun gun to shoot and the price of 9mm ammo will let you do it a lot more. Careful selection of modern JHP makes the 9mm no slouch for self-defense. On the other hand, .40 makes bigger holes. The .40 is more snappy, but still very controllable, at least it is in the fullsize (haven't shot the compact). Between the two, I prefer 9mm for the range, and .40 for everyday carry.
i was in the same position as you before i purchased my 9mm. i went with the 9mm based on what i could find doing searches and below is a link to one of the sites that helped me make the decision. i have owned a .40 in the past but i never owned a 9mm. that is the reason why i was comparing the two.
let be known that i am not bad mouthing the .40 by posting this. this is something that i found that could be construed as bias but helped me make the decision to by my 9mm.
I've carried every popular caliber from .32 all the way up to and including .44 mag. I've standardized all my handguns to 9mm. .357 mag, and .45 acp.
IMHO .40 is a solution looking for a problem. .40 has more recoil (thus slower follow up shots), less capacity, and is more expensive to shoot. 9mm can do anything .40 can do with less recoil, more capacity, and is cheaper to shoot.
I carry 124Gr +p Gold Dots in 9mm. I have faith that should they be needed and I put them where they need to go they'll work just fine.
I went with 9mm as it's mainly a range gun. I have a .357 mag by the bed and I hear few arguments about its stopping power. 9mm is more enjoyable for me to shoot, cheaper, and allows for more practice. I'm sure it'll do the job if needed. The 9mm round has been taking down folks for decades, and if it were ineffective, it would've been phased out of militaries before many of us were born.
Shot placement is what counts and you can only achieve that with much practice. 9mm allows me to practice more due to my budget, but if your budget allows for higher ammos costs, go for the .40, it's an effective round as well.
You really need to shoot them to make the proper choice for YOU. Our experiences are nothing more than anecdotal tidbits. I went with a 9 for a number of reasons. I wanted to use it for IDPA and for me to do so means lots of practice. So the cost of 9mm vs 40 vs. 45 meant a lot. Having owned a 40 and sent a couple of thousand rounds down range I can say that, FOR ME, the 40 is not a fun caliber to shoot, so getting lots of practice would not have been a pleasent experience.
It was never my goal to have this become my carry gun or primary defensice weapon, but having sent a couple of hundred rounds down range I can say that there is a VERY good chance that my XD45 will get retired and the MP9 will become my carry and defensive gun. At least till the 45 version comes out later this year. Am I going to feel unprepared because I am carrying a 9 instead of a 45 or 40? Not at all. Shot placement ALWAYS beats anything out there. As a wise man once mentioned: I would rather have someone shoot at me all day with a 50BMG and miss than someone hit me with a 22 once.
Buy what youre confortable shooting and will invest time in mastering. When the SHTF that piece you mastered and can hit with asif it were second nature will serve you MUCH better than the piece you never wanted to take to the range cause it sucked to fire it.
I would sugest you try going to the range and renting both. I rented the 40 and both the 9 full size and compact. After 300 through each i settled on the 40 as after trying the Sig, Glock and the xd all in 40 and all sizes i figured the M&P had the least recoil felt the best in my hand and after i compared all the targets i had shot with the 40's it was the most accurate of all of them for me. I loved the 9's and was spot on center mass every time but i wanted the power of the 40. Plus after looking around i found Magtech 180 grain fmj practice ammo for $11.37 for 50 i ordered 1000 and bought the gun. To make it easier when i teach my wife to shoot i ordered Advanced Recoil Reduction System from DPM Systems, after reading a article on the 9mm here
http://www.gunblast.com/SW_MP9.htm and that should be here tomorrow and out to the range monday. But the main thing is you cant base experiencesb with other 40's on the M&P because it is really diffrent.
I purchased the M&P 40 It shoots great. recoil is nothing I have shot a Glock 22, Forgive me god of glock, but M&P is really a great pistol. I live In Texas, automobile carry all depends on the local LE agency If Im not mistaken the State has to prove you were not traveling, instead of you proving you are traveling. NO im not carrying it in my car yet, I will be getting my CCL soon so I can be 100% legal. Thanks for all the great responses, Im a newbie and really impressed with response time and friendliness. Peace
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