147g 9mm out of a sub compact - Page 2

Stevew · October 22nd, 2009, 05:31 PM

Quote:

Originally Posted by zacii

That makes sense. I hadn't thought about it before, the heavier bullet would take longer to exit the barrel. If the powder charge is generating equal pressures in both the lighter and heavier bullet cartridges, then naturally, the heavier bullet would take longer to exit...

The 124g bullet will typically have more powder than 147g bullet due to the higher pressure created by the heavier bullet and greater bearing surface. Just make sure the bullet will expand at the velocity generated by your gun.
Stevew

digitalexplr · October 22nd, 2009, 05:52 PM

The difference between a 147 out of a 4" barrel and out of a 3" barrel is only around 50fps. This is not significant. The 147 work fine out of the 9sc and will ruin a BG's day if he catches one.

The heavier 147 will give somewhat deeper penetration than a 124 from the same gun but either one will do the trick.

An interesting fact of penetration is that higher velocity out of the barrel does not mean deeper penetration in the target. Deeper penetration is the result of mass not velocity.

TravisABQ · October 22nd, 2009, 07:07 PM

Quote:

Originally Posted by digitalexplr

The difference between a 147 out of a 4" barrel and out of a 3" barrel is only around 50fps. This is not significant. The 147 work fine out of the 9sc and will ruin a BG's day if he catches one.

The heavier 147 will give somewhat deeper penetration than a 124 from the same gun but either one will do the trick.

An interesting fact of penetration is that higher velocity out of the barrel does not mean deeper penetration in the target. Deeper penetration is the result of mass not velocity.

Well, this is my own rationale for using heavier loads. Penetration vs expansion which would produce AT BEST, hundredths of an inch of expansion.

Accuracy + multiple hits.... I don't think the specs of the loads matters as much as those variables.

(I am not an expert)

ntg · October 22nd, 2009, 07:08 PM

Well...in simple terms I was told penetration is a factor of mass and velocity...and obviously the media you're punching through. General rule of thumb to me is with two different weights going the same speed the heavier one will penetrate further assuming they're shot into the same material/media. There's you a non-expert, two-cent opinion.

I agreed with that said above the 147 vs. 124 isn't going to make that much of a differnce. I certainly don't want to get hit with either one!

spooter66 · October 22nd, 2009, 07:51 PM

Here is a very good article that answers your question: Best Choices for Self Defense Ammo

Here is a picture from the article. Notice the penetration depths of the same caliber bullets that are different weights. Even though the lighter bullets are moving fast (fps) they still don't penetrate as far as the bullets with more mass.

D Strokes · October 23rd, 2009, 09:52 PM

AFAIK, a 147 gr bullet shot out of a 3" barrel will have more inertia than a 115 or 124 gr bullet shot out of a 3" barrel.

The more the inertia, the more it takes to stop the projectile.

I use 147 gr Federal HST.

gotammo · October 26th, 2009, 05:51 PM

the difference of an inch or two is insignificant you will not loose enough speed to worry about, after all you will not be shooting at 50 yards if you need to defend yourself.
At contact to 10 feet the loss of 100 ft/sec won't matter shoot what works best in your gun and don't worry about the weight.

mag318 · November 1st, 2009, 05:40 PM

I use 147 gr as my carry round and living in the midwest people wear heavy clothing this time a year, so penetration is important. My department when they went to a 9mm issued Winchester Black Talon 147 gr ammo. Winchester now calls it Ranger T and it is a great 9mm load. Second to that the Federal 147 gr HST which is building a good reputation. Penetration is the second most important factor when it comes to stopping bad guys, the first as always is bullet placement.

Superhouse 15 · November 2nd, 2009, 10:46 AM

Look here and do some comparisons:
Ballistics by the inch

And sometimes the heavier loads penetrate more because they expand much less, less surface area to slow the projectile down. Regardless of what you think of thier methods and results, there is some great information on the ballsitics and perfomance of ammunition in short barrels in Marshal and Sanow's books.

And a quick calculation for energy, Velocity squared x bullet weight in grains divided by the constant 450240 should give energy as FPE.

October 22nd, 2009, 05:52 PM	#12
digitalexplr Senior Member Join Date: Oct 2007 Location: Jefferson City, MO Posts: 655	The difference between a 147 out of a 4" barrel and out of a 3" barrel is only around 50fps. This is not significant. The 147 work fine out of the 9sc and will ruin a BG's day if he catches one. The heavier 147 will give somewhat deeper penetration than a 124 from the same gun but either one will do the trick. An interesting fact of penetration is that higher velocity out of the barrel does not mean deeper penetration in the target. Deeper penetration is the result of mass not velocity. __________________ XD9sc XD40 Service Mossberg 590a1 NRA Life Member

October 23rd, 2009, 09:52 PM	#16
D Strokes Member Join Date: Feb 2009 Location: Texas Posts: 39	AFAIK, a 147 gr bullet shot out of a 3" barrel will have more inertia than a 115 or 124 gr bullet shot out of a 3" barrel. The more the inertia, the more it takes to stop the projectile. I use 147 gr Federal HST. __________________ "People willing to trade their freedom for temporary security deserve neither and will lose both." — Benjamin Franklin

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October 22nd, 2009, 07:08 PM	#14
ntg Member Join Date: Aug 2009 Location: ID Posts: 46	Well...in simple terms I was told penetration is a factor of mass and velocity...and obviously the media you're punching through. General rule of thumb to me is with two different weights going the same speed the heavier one will penetrate further assuming they're shot into the same material/media. There's you a non-expert, two-cent opinion. I agreed with that said above the 147 vs. 124 isn't going to make that much of a differnce. I certainly don't want to get hit with either one!

October 26th, 2009, 05:51 PM	#17
gotammo Member Join Date: May 2006 Location: CT Posts: 438	the difference of an inch or two is insignificant you will not loose enough speed to worry about, after all you will not be shooting at 50 yards if you need to defend yourself. At contact to 10 feet the loss of 100 ft/sec won't matter shoot what works best in your gun and don't worry about the weight.

November 1st, 2009, 05:40 PM	#18
mag318 Member Join Date: Mar 2008 Location: Illinois Posts: 42	I use 147 gr as my carry round and living in the midwest people wear heavy clothing this time a year, so penetration is important. My department when they went to a 9mm issued Winchester Black Talon 147 gr ammo. Winchester now calls it Ranger T and it is a great 9mm load. Second to that the Federal 147 gr HST which is building a good reputation. Penetration is the second most important factor when it comes to stopping bad guys, the first as always is bullet placement.

November 2nd, 2009, 10:46 AM	#19
Superhouse 15 Distinguished Member Join Date: Aug 2006 Location: Florida Posts: 1,509	Look here and do some comparisons: Ballistics by the inch And sometimes the heavier loads penetrate more because they expand much less, less surface area to slow the projectile down. Regardless of what you think of thier methods and results, there is some great information on the ballsitics and perfomance of ammunition in short barrels in Marshal and Sanow's books. And a quick calculation for energy, Velocity squared x bullet weight in grains divided by the constant 450240 should give energy as FPE.