Best Bullet Weight for 9mm with 3.6in Barrel?

This is a discussion on Best Bullet Weight for 9mm with 3.6in Barrel? within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; In this thread Iíve been discussing buying a 9mm for my girlfriend, most likely either a Sig P239 or a Glock 26. Both have a ...

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Thread: Best Bullet Weight for 9mm with 3.6in Barrel?

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    Senior Member Array CEW58's Avatar
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    Question Best Bullet Weight for 9mm with 3.6in Barrel?

    In this thread Iíve been discussing buying a 9mm for my girlfriend, most likely either a Sig P239 or a Glock 26. Both have a 3.6 inch barrel. My experience with the 9mm is limited to the M9 (Beretta 92) using military FMJ ammo. (I carry either a .40 S&W or a .357 Mag)

    So assuming we buy either firearm with a 3.6 inch barrel, which bullet weight will perform best for self-defense?
    The difference between stupidity and genius is that genius has its limits. ~ Albert Einstein

    Sig P229 DAK - .40 S&W
    Ruger SP101 - .357 Mag

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    Speer makes a +p Gold Dot load especially for short barrels. That's what I carry in my M&P 9c.
    Battle Plan (n) - a list of things that aren't going to happen if you are attacked.
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    Senior Member Array CEW58's Avatar
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    Quote Originally Posted by MattLarson View Post
    Speer makes a +p Gold Dot load especially for short barrels. That's what I carry in my M&P 9c.
    I just looked that up on their website:

    Gold Dot Short Barrel Personal Protection - 9mm Luger +P
    124 gr with a muzzle velocity of 1150 fps out of a 3.5 in test barrel

    Sounds good!

    Have you had any issues with your M&P9c? I keep reading about "inadvertent magazine drops" and a few other issues. That's the reason I didn't include it in my list of compact 9mms.
    The difference between stupidity and genius is that genius has its limits. ~ Albert Einstein

    Sig P229 DAK - .40 S&W
    Ruger SP101 - .357 Mag

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    There were some issues with soft magazine releases being rounded off though use. I had one of those, and S&W sent me two replacement parts express mail.

    Replaced the magazine catch with the new one, and it's never been a problem since.

    With the exception of the mag release issue, it's been a very reliable pistol. Never had a failure to feed or extract with it, and it's had at least 1,500 rounds through it.

    Matt
    Battle Plan (n) - a list of things that aren't going to happen if you are attacked.
    Blame it on Sixto - now that is a viable plan.

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    Distinguished Member Array Brady's Avatar
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    I always try to go with the heaviest bullet I can find. Look hard for some 147 grains and try them out at the range. Do the wet phone book test and compare with other rounds.
    ...he that hath no sword, let him sell his garment, and buy one. Luke 22:36
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    Member Array Archie's Avatar
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    And the answer is...

    There are two ways to get 'power' from a projectile. One is to measure by kinetic energy, which is equal to one-half of the product of multiplying the mass of the bullet by the velocity squared. (This is foot pounds of energy.) The other method is momentum. This is simply mass times velocity and it isn't normally discussed much.

    'Energy' is more dependent on velocity, 'momentum' is more dependent on bullet weight.

    I'm a heavy bullet guy from the start. In short barrels, where velocity can suffer by comparison, bullet weight tends to maintain momentum. So I'm still a heavy bullet guy.

    By the way, there is no measurable answer as to which works better. (Which explains the never ending "9 vs 45" argument.) You're a big kid and it's your gun; take your pick.
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