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slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
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Posted: Sun Dec 25, 2011 8:57 pm Post subject: Making a Bullet Trap to Test Terminal Performance |
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I went to the range last week and used the bullet trap I have been developing to capture a Berger 150gr VLD and Barnes 110gr TTSX. I wanted to see what the terminal performance difference was going to be between a bullet that was designed to penetrate a couple of inches then fragment (VLD) and one designed for expansion with 100% weight retention (TTSX). From the picture below, you can see the surprise I got. The VLD is on the left and the TTSX on the right.
Detail regarding the Bullet Trap can be found in this article.
Making a Bullet Trap to Test Terminal Performance
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_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Last edited by slimjim on Fri Jun 01, 2012 3:38 am; edited 3 times in total |
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slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
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Posted: Sun Dec 25, 2011 9:01 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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The TTSX performed as expected. It mushroomed to twice its size and bored through 3 phone books and 7 magazines. The VLD, however, piled up as a flatted slug 15 magazines deep. Nice penetration but no fragmentation and in a strange state with the hollow-point tip still intact as you can see from the picture below. I've included the Hornady 130gr GMX from a prior range session for comparison.
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_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
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DallanC Site Admin
Joined: Jan 18, 2005 Posts: 3571 Location: Utah
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Posted: Sun Dec 25, 2011 9:06 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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That VLD doesnt look like it was stabilized when it hit the target. Really wierd result!
-DallanC
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slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
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Posted: Sun Dec 25, 2011 9:08 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Investigation revealed that the VLD bullet did not expand on impact but yawed and was turned 90 degrees passing through the first phone book in the box. The VLD bullet actually went through the remaining phone books and magazines backwards until the copper jacket crumbled and the bullet expanded to a stop.
I'm going to write an article on building and using a bullet trap and wanted to use this topic for our discussion.
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Last edited by slimjim on Mon Dec 26, 2011 8:25 am; edited 1 time in total |
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slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
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Posted: Sun Dec 25, 2011 9:12 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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DallanC wrote: |
That VLD doesnt look like it was stabilized |
I checked its stability factor at 1.4. That should be plenty of stabilization. The 130gr GMX has a lower stability factor and did fine.
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
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tlo7mm Super Member
Joined: Nov 15, 2010 Posts: 426 Location: Oregon
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Posted: Sun Dec 25, 2011 10:17 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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That is a pretty great experiment, I think I will try it with my loads as I have several different types of bullets to try for my 7 mag and my .222 Rem. Interesting how that VLD seemed to perform like it did when I have talked to so many that swear they are great. Im sure anything you shoot with any of those rounds would go down but would you really want to risk it. I hada core lokt that performed even worse then that which is why I stopped using them.
_________________ "If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun." ~ The Dalai Lama
Never ascribe to malice that which is adequately explained by incompetence. - Napoleon Bonaparte
The wisdom of man never yet contrived a system of taxation that would operate with perfect equality. - Andrew Jackson
Patriotism is supporting your country all the time, and your government when it deserves it. - Mark Twain |
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slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
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Posted: Sun Dec 25, 2011 10:29 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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The article going into more detail about the bullet trap is now posted here.
Making a Bullet Trap to Test Terminal Performance
Thanks, DallanC, for posting it so quickly!
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Last edited by slimjim on Fri Jun 01, 2012 3:38 am; edited 1 time in total |
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Pumpkinslinger Super Member
Joined: Sep 22, 2007 Posts: 5001 Location: NC foothills
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Posted: Mon Dec 26, 2011 7:42 am Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Slim, this is a good thread and that's a great article! I'm looking forward to more on this line of testing.
_________________ Mike
"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle |
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Suzanne Super Member
Joined: Jun 27, 2009 Posts: 3323 Location: Eugene, Oregon
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Posted: Mon Dec 26, 2011 8:45 am Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Thanks SlimJ, that was very well done for sure. I've seen that sideways yaw reaction on one of my targets......now which rifle was it? I'm glad you did the .270, I've really liked the round and wondered how it performed. You saved me the trouble. I think I'd like to do that too. You are very analytical and got me interested.
Suz
_________________ May the moon keep you centered,
May the sun keep you dancing,
And the stars shed light on your dreams. |
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Donut Slayer Super Member
Joined: Jun 27, 2007 Posts: 594 Location: Pensacola, Florida
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Ominivision1 Super Member
Joined: Sep 20, 2010 Posts: 2984 Location: Iowa
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Posted: Mon Dec 26, 2011 6:42 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Slim, excellent post, I have also did some peniteration with both wet and dry newspaper, my best results were with wet paper.
_________________ Regards
Limitations are but boundaries created inside our minds.
Last edited by Ominivision1 on Tue Dec 27, 2011 5:49 am; edited 1 time in total |
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glockman55 Super Member
Joined: Dec 12, 2005 Posts: 831 Location: Michigan
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Posted: Mon Dec 26, 2011 7:37 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Very cool...I'm going to try this for pistol defence loads.. I tried the water jug in front of a dirt mound, but I like the phone book idea, Thanks..
_________________ Are you boys gonna pull them pistols or whistle dixie? |
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jeh7mmmag Member
Joined: Dec 24, 2006 Posts: 223 Location: DFW, TX.
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Posted: Mon Dec 26, 2011 9:27 pm Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Great job Slim... I like the fact the bullet penetrated the lawyer head and did not pass through. Great result. Good stuff.
_________________ mypva.org/
DAV
VNE USS LEX CVT-16 BLUE GHOST V2 CATS ABE-2 |
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Ominivision1 Super Member
Joined: Sep 20, 2010 Posts: 2984 Location: Iowa
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Posted: Tue Dec 27, 2011 5:53 am Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Looking at the VLD, it amazes me how that bullet came apart like that.
_________________ Regards
Limitations are but boundaries created inside our minds. |
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slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
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Posted: Tue Dec 27, 2011 9:17 am Post subject: Re: Making a Bullet Trap to Test Terminal Performance |
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Ominivision1 wrote: |
Looking at the VLD, it amazes me how that bullet came apart like that. |
OV1, I'm going repeat the test on the VLD again. However, when testing for reliability, I have found that 10 passes in a row is not enough to determine a high level of confidence. One failure - is way too many.
Thanks, all for the compliments.
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
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