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Mar 25th, 2012
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Berm for .50 BMG? #7179599
05/25/18 01:45 PM
05/25/18 01:45 PM
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I have found some data that is showing me what it will take. I was wondering if anyone has more data.

Here's the worst case scenario, armor piercing at 50 yards, multiple rounds.

What I'm looking at is a left side, back, right side cross tie enclosure, 8' wide X 8' deep, 4' to 5' high. A sheet of 1/2" AR 500 on the back wall, then the whole thing filled with dirt.



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Re: Berm for .50 BMG? [Re: FiremanJG] #7179808
05/25/18 04:31 PM
05/25/18 04:31 PM
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Forney, Tx
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We just shoot our AP rounds into a plastic 55 gallon drum fille with sand, in front of a regular berm. 8x8 is pretty big, unless you plan on missing


Originally Posted By: bill oxner
Ever spit it out rather than swallow it?

Originally Posted By: pegasaurus
Enjoy it while you can. One day you might be complaining about NOT getting random pop-ups in the morning. grin
Re: Berm for .50 BMG? [Re: BigPig] #7179836
05/25/18 05:06 PM
05/25/18 05:06 PM
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You understand it's 8 wide, 8 deep, but mot 8' tall right? It will be used at 600 yards, also. That's about how wide the current berm is.



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Re: Berm for .50 BMG? [Re: FiremanJG] #7179870
05/25/18 05:31 PM
05/25/18 05:31 PM
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North Texas - God's Country
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At 600 with a fifty and an 8í berm. I wouldnít pull the trigger. Too easy to overshoot that little berm. That round is way too destructive. Itís gotta be stopped every time.


Cast



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Re: Berm for .50 BMG? [Re: FiremanJG] #7179875
05/25/18 05:33 PM
05/25/18 05:33 PM
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Killeen/Ft Hood, TX
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Didnít you watch the original tremors movie? The 50 BMG doesnít penetrate dirt well


Originally Posted by bill oxner
I plowed mules.
Originally Posted by Roll-Tide
I did build a cabin. Aka the brokeback shack.

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Re: Berm for .50 BMG? [Re: FiremanJG] #7179877
05/25/18 05:34 PM
05/25/18 05:34 PM
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bang IT WILL NOT BE EIGHT FEET TALL!

With a proper scope, it's easy to keep rounds on the berm. Didn't have any .308 leave berms yesterday, while I was teaching. And that was a new to that distance shooter.



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Re: Berm for .50 BMG? [Re: SapperTitan] #7179878
05/25/18 05:35 PM
05/25/18 05:35 PM
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Wolfe City, TX
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Originally Posted By: SapperTitan
Didnít you watch the original tremors movie? The 50 BMG doesnít penetrate dirt well


I'm thinking 8 feet of dirt, for it to travel through, will get it done.



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Re: Berm for .50 BMG? [Re: FiremanJG] #7179899
05/25/18 05:47 PM
05/25/18 05:47 PM
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North Texas - God's Country
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Originally Posted By: FiremanJG
bang IT WILL NOT BE EIGHT FEET TALL!

With a proper scope, it's easy to keep rounds on the berm. Didn't have any .308 leave berms yesterday, while I was teaching. And that was a new to that distance shooter.


I see that now, thatís even more dangerous.

Hey, visit NTSA and look at their 50 yard range. Itís set up as you describe with a taller berm. You might get some ideas re construction.


Cast



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Re: Berm for .50 BMG? [Re: Cast] #7179917
05/25/18 06:08 PM
05/25/18 06:08 PM
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Wolfe City, TX
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Originally Posted By: Cast
Originally Posted By: FiremanJG
bang IT WILL NOT BE EIGHT FEET TALL!

With a proper scope, it's easy to keep rounds on the berm. Didn't have any .308 leave berms yesterday, while I was teaching. And that was a new to that distance shooter.


I see that now, thatís even more dangerous.

Hey, visit NTSA and look at their 50 yard range. Itís set up as you describe with a taller berm. You might get some ideas re construction.


That height is not dangerous. My berms are 5' tall, max, and work every day. The guys shooting the .50 will be competent. This is not for general use.

I've read what the military has decided is sufficient thickness, and it looks like I'm doubling what they require.


From: The Ultimate Sniper: An Advanced Training Manual for Military and Police Snipers by John Plaster.†

Sand at 600 meters: 12"†
Sand at 1500 meters: 6"†
Clay at 600 meters: 26"†
Clay at 1500 meters: 21"†

50 Cal armor piercing (Muzzle velocity not given):†

Sand at 600 meters: 12"†
Sand at 1500 meters: 6"†
Clay at 600 meters: 27"†
Clay at 1500 meters: 21"†

50 AP at 100 yards:†

Concrete 9"†
Timber (logs) 96"†
Dry Soil: 28"†
Wet Soil: 42"†
Dry Sand: 24"†
Wet Sand: 36"†
Dry Clay: 42"†
Wet Clay: 64



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Re: Berm for .50 BMG? [Re: FiremanJG] #7179924
05/25/18 06:12 PM
05/25/18 06:12 PM
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Chambers County
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Might wanna go higher than 8'.

Re: Berm for .50 BMG? [Re: FiremanJG] #7179962
05/25/18 06:55 PM
05/25/18 06:55 PM
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Read closer. His berm is 4í-5í tall.


Cast



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Re: Berm for .50 BMG? [Re: Cast] #7179999
05/25/18 07:31 PM
05/25/18 07:31 PM
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Chambers County
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Originally Posted By: Cast
Read closer. His berm is 4í-5í tall.

I read what he wrote before I posted.

Re: Berm for .50 BMG? [Re: TexFlip] #7180013
05/25/18 07:51 PM
05/25/18 07:51 PM
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bastrop county
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Originally Posted By: TexFlip
Might wanna go higher than 8'.
duel


hold on Newt, we got a runaway
Re: Berm for .50 BMG? [Re: FiremanJG] #7180074
05/25/18 09:06 PM
05/25/18 09:06 PM
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Originally Posted By: FiremanJG
You understand it's 8 wide, 8 deep, but mot 8' tall right? It will be used at 600 yards, also. That's about how wide the current berm is.


Yes, I can read.

Why is this only at 600? Is that just the berm you want to use? What gun are they using? The Barrett barrel for AP rounds isnít very accurate. We were shooting 2 MOA and that was considered good by Barrett. Obviously, a 5 foot berm will be plenty for 2 MOA at 600.


Originally Posted By: bill oxner
Ever spit it out rather than swallow it?

Originally Posted By: pegasaurus
Enjoy it while you can. One day you might be complaining about NOT getting random pop-ups in the morning. grin
Re: Berm for .50 BMG? [Re: FiremanJG] #7180078
05/25/18 09:13 PM
05/25/18 09:13 PM
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JG...will this be ready for the Precision Match in July?


Initial Success or Total Failure

Re: Berm for .50 BMG? [Re: BigPig] #7180107
05/25/18 09:51 PM
05/25/18 09:51 PM
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Originally Posted By: BigPig
Originally Posted By: FiremanJG
You understand it's 8 wide, 8 deep, but mot 8' tall right? It will be used at 600 yards, also. That's about how wide the current berm is.


Yes, I can read.

Why is this only at 600? Is that just the berm you want to use? What gun are they using? The Barrett barrel for AP rounds isnít very accurate. We were shooting 2 MOA and that was considered good by Barrett. Obviously, a 5 foot berm will be plenty for 2 MOA at 600.





600 is the distance some ammo needs to be tested. Don't know what rifle.



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Re: Berm for .50 BMG? [Re: TXGUNNER308] #7180108
05/25/18 09:51 PM
05/25/18 09:51 PM
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Originally Posted By: TXGUNNER308
JG...will this be ready for the Precision Match in July?


No



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Re: Berm for .50 BMG? [Re: FiremanJG] #7180179
05/25/18 11:24 PM
05/25/18 11:24 PM
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I feel like you havenít thought this through enough


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Re: Berm for .50 BMG? [Re: FiremanJG] #7180194
05/25/18 11:39 PM
05/25/18 11:39 PM
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Dallas Texas
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For some reason I think the usual saying applies:

Rather have it and not need it than need it and not have it.

Play it safe man, you have nothing to lose really so why not? You did come for opinions correct?

Re: Berm for .50 BMG? [Re: Ramball36] #7180204
05/25/18 11:51 PM
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Originally Posted By: Ramball36
I feel like you havenít thought this through enough


You shut up.



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Re: Berm for .50 BMG? [Re: That 1 GUy] #7180206
05/25/18 11:51 PM
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Originally Posted By: That 1 GUy
For some reason I think the usual saying applies:

Rather have it and not need it than need it and not have it.

Play it safe man, you have nothing to lose really so why not? You did come for opinions correct?


No, I came looking for experience, and all I'm getting are opinions. Kmon1 has had a .50, not sure whom else has.



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Re: Berm for .50 BMG? [Re: FiremanJG] #7180220
05/26/18 12:03 AM
05/26/18 12:03 AM
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Originally Posted By: FiremanJG
Originally Posted By: Ramball36
I feel like you havenít thought this through enough


You shut up.


roflmao

Re: Berm for .50 BMG? [Re: FiremanJG] #7180264
05/26/18 12:56 AM
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I donít have a 50cal but have read this before and find it interesting

https://www.energy.gov/sites/prod/files/2013/05/f1/Range_Design_Criteria.pdf

Figure 2 (pg 13) gives various materials and how many inches is needed to stop various calibers including 50 cal

Just a couple more for reference as you already had most labeled

Last edited by Cleric; 05/26/18 12:57 AM.
Re: Berm for .50 BMG? [Re: Cleric] #7180269
05/26/18 01:05 AM
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Originally Posted By: Cleric
I donít have a 50cal but have read this before and find it interesting

https://www.energy.gov/sites/prod/files/2013/05/f1/Range_Design_Criteria.pdf

Figure 2 (pg 13) gives various materials and how many inches is needed to stop various calibers including 50 cal

Just a couple more for reference as you already had most labeled


up

Earth, packed or tampted 60"
.......undisturbed compact 66"
.......freshly turned 72"



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Re: Berm for .50 BMG? [Re: FiremanJG] #7180274
05/26/18 01:14 AM
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Yeah by the numbers you look good...


If it were me, being a bit risk adverse, I would put a layer of some gravel filled concrete blocks at the back so it would be plate, concrete blocks then dirt. Or if you wanted to be ultra paranoid fill them with concrete.

I know some people are concerned about how it will work, but I am 99.9% sure you will only allow people to do this with explicit permission and in certain ways. I doubt you are going to let someone walk up with a 50 cal and let them shoot long range.

Personnelly I donít see the value in 50cals but the beauty about this country is it donít matter if I would do it, you can do what you what as long as itís safe

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