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Old 02-16-2011, 19:40   #1
MplsPete
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How to choose between 9mm weights?

Sorry for the total newb question...

Bought a Glock 17 recently as my first handgun. When I checked out 9mm ammo to purchase, I see weights from 115g to 147g+. Why would one buy a heavier ammo over another? Why would you buy one weight over the other? Thanks in advance
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Old 02-16-2011, 19:55   #2
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Fat bullets need love too.

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Old 02-16-2011, 20:09   #3
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The way I see it, the heavier bullets would hit harder at close range. More mass hit harder.
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Old 02-16-2011, 20:16   #4
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May i ask what this fine firearm is being used for, that can help point us in the right direction in order to help you pick out some quality ammo.
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Old 02-16-2011, 20:43   #5
MplsPete
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May i ask what this fine firearm is being used for, that can help point us in the right direction in order to help you pick out some quality ammo.
In general, home defense. I also plan on quite a bit of fun time at the range with this being my first firearm.
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Old 02-16-2011, 20:45   #6
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go big, mo better.
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Old 02-16-2011, 20:53   #7
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All weights of 9mm have their virtues. The 147's tend to get more penetration. However, A 115 +P+ load can realllllly open up and dump it's energy fast. However, there is a great debate as to whether or not the amount of energy (joules or Ft/lbs) actually matters on handgun wounds. As long as you use a proven loading such as Speer Golddots, 9PBLE, Golden Saber, ect. You will not notice too much difference between weights. I doubt many people could tell them apart in a gel test without captions.

Edit: Summary: Bullet Design seems to be far more influential than the weight in 9mm.
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Old 02-16-2011, 20:54   #8
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I personally dont think it matters as much as it used to. I like to keep several boxes of SD ammo stored away.

I buy whatever is on sale for a good deal. Winchester Ranger, Federal HST, and Speer Gold Dot are all excellent choices. I dont prefer +P myself, but in a full size gun like the G17 you prolly wouldn't notice the extra recoil as much.

My preferred load is the Gold Dot 147g. But I bought a 50rd of HST 124g for $16.99 today. I thought that was too good of a deal to pass up.
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Old 02-16-2011, 21:12   #9
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Assuming you are buying premium ammunition, for the most part it doesn't matter. They are all designed for the FBI tests.

Now, if you are really into this.....
1. Some guns are more accurate with one weight than others.
2. Some guns are more accurate with one brand of ammo than others.
3. Some people say they can feel the different weights. The recoil is suppose to be sharper on light bullets and more intense on heavy bullets. I personally can not feel the difference in recoil with 9mm loads. In 45ACP/Super, I can.
4. If you have/get a suppressor, you want subsonic rounds (145/152gr bullets).
5. Most plinking ammo is 115gr, so.....
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Old 02-16-2011, 21:23   #10
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Quote:
Originally Posted by RWBlue View Post
Assuming you are buying premium ammunition, for the most part it doesn't matter. They are all designed for the FBI tests.

Now, if you are really into this.....
1. Some guns are more accurate with one weight than others.
2. Some guns are more accurate with one brand of ammo than others.
3. Some people say they can feel the different weights. The recoil is suppose to be sharper on light bullets and more intense on heavy bullets. I personally can not feel the difference in recoil with 9mm loads. In 45ACP/Super, I can.
4. If you have/get a suppressor, you want subsonic rounds (145/152gr bullets).
5. Most plinking ammo is 115gr, so.....
THIS should be #1....The rest, while accurate, is minutia.
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Old 02-16-2011, 22:49   #11
Glolt20-91
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From Hornady, while their 124gr XTP penetrated deeper than their 147gr XTP, the 147gr XTP has better terminal performance;

http://www.hornadyle.com/products/mo...8&sID=37&pID=2

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Old 02-16-2011, 23:32   #12
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Quote:
Originally Posted by Glolt20-91 View Post
From Hornady, while their 124gr XTP penetrated deeper than their 147gr XTP, the 147gr XTP has better terminal performance;

http://www.hornadyle.com/products/mo...8&sID=37&pID=2

Bob
This is very interesting.

I take it that the 124gr is not loaded to +p or ++P like it could be.
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Old 02-16-2011, 23:51   #13
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This is very interesting.

I take it that the 124gr is not loaded to +p or ++P like it could be.
A 124gr XTP +P+ wouldn't be that much slower than their .357SIG XTP, IME

Bob
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Old 02-17-2011, 03:15   #14
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I'll take aggregate deeper and more consistent penetration over expansion. So, I choose 147gr HP.
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Old 02-17-2011, 06:43   #15
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I learned long ago to stay away from 147-grain 9mm loads. I never saw the sense of taking a perfectly good 9mm cartridge and downloading it to the level of a really good .38 Special +P.
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Old 02-17-2011, 08:03   #16
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I don't worry about weight much, just finding good 9mm from "The List"
http://ammo.ar15.com/project/Self_De.../index.htm#9mm
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Old 02-17-2011, 08:51   #17
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Quote:
Originally Posted by Glolt20-91 View Post
A 124gr XTP +P+ wouldn't be that much slower than their .357SIG XTP, IME

Bob
If you hang out in reloading rooms you will hear people who claim that they can get the 9mm up to 357sig speeds. Personally, I have not tried it.
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Old 02-17-2011, 09:05   #18
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Quote:
Originally Posted by RWBlue View Post
Assuming you are buying premium ammunition, for the most part it doesn't matter. They are all designed for the FBI tests.

Now, if you are really into this.....
1. Some guns are more accurate with one weight than others.
2. Some guns are more accurate with one brand of ammo than others.
3. Some people say they can feel the different weights. The recoil is suppose to be sharper on light bullets and more intense on heavy bullets. I personally can not feel the difference in recoil with 9mm loads. In 45ACP/Super, I can.
4. If you have/get a suppressor, you want subsonic rounds (145/152gr bullets).
5. Most plinking ammo is 115gr, so.....
Good post, but you forgot the most important criteria!

A. Some guns cycle better with certain weights/brands ammo than with other ammo.

After that criteria is satisfied, then move on to concerns 1 through 5

Last edited by ithaca_deerslayer; 02-17-2011 at 09:06..
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Old 02-17-2011, 09:31   #19
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Originally Posted by deathpriest View Post
The way I see it, the heavier bullets would hit harder at close range. More mass hit harder.
Higher velocity hits harder too.

I prefer mid-weight simply to keep muzzle energy high.
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Old 02-17-2011, 10:25   #20
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Shoot 'em all & stick w/whichever weight you do your best work with.
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