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Brass vs. Steel Cased Ammo An Epic Torture Test

This is a discussion on Brass vs. Steel Cased Ammo An Epic Torture Test within the Ammunition forums, part of the M14 M1A Forum category; Comprehensive article here: http://www.luckygunner.com/labs/bras...email#reliable...


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Old January 10th, 2013, 08:16 AM   #1
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Brass vs. Steel Cased Ammo An Epic Torture Test

Comprehensive article here:

http://www.luckygunner.com/labs/bras...email#reliable

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Old January 10th, 2013, 11:17 AM   #2
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Very nice!

Thanks for the post!

JWB

Thanks from Circlehook
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Old January 10th, 2013, 12:09 PM   #3
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It certainly gave me pause. I have had no problems with TulAmmo in AR, Mini, or SCAR. However, I don't shoot 300/500/1K rounds back to back in the conditions of the test either.... more like 30 rounds or less over the course of a minute or two during a 3-gun stage, then the gun cools completely before the next run. I'm QUITE surprised how badly the barrels were damaged under the test conditions. I wonder what it is about the situation that creates such damage... whether it's heat or abrasion or both. Fascinating stuff.

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Old January 10th, 2013, 12:32 PM   #4
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when you take into account the crap that brown bear leaves in your gun, you gotta clean it out, and i bet you would see less wear.

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Old January 12th, 2013, 06:45 AM   #5
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+ 1 for Federal ammo!!!

When i pulled the bullets here is what i found!!

Federal 100 rnd pack 55 grain FMJ .223
Federal brass
Average:OAL 2.192
Bullet wt. 54.82, 54.84, 54.70 grains.
Spherical/ball powder(???)
Ave. grains 26.44, 26.20, 26.30, 26.24

Federal 5.56 100 round pack
OAL 2.255
Lc brass annealed
27.90, 27.88,27.92 grains of
Spherical /ball powder
Sorry didnt weigh the bullets indiv

Federal GSM BHTP OAL 2.52
Ave grains powder 24.66,24.66, 24.72
69 grain bullet

Hope this helps.
And by the way at 42-49 degrees farenheight when barrel cools down quicker i guess
The groupings are so much better than at 52 degrees!!

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Old January 17th, 2013, 01:17 PM   #6
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Only three barrels cut?

I only saw three barrels cut, did I miss something or are the holding back information. Seems odd. If there is no comparison with all the barrels involved. I say BS. If I have missed it in the thread forget you have seen this. Packing PS. Good Guns deserve better than cheep steel ammo


Last edited by Packing a 45; January 17th, 2013 at 01:30 PM. Reason: Wanted too add to it.
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Old January 17th, 2013, 02:06 PM   #7
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Great article/test. It told me everything I already know...steel ammo sucks. It would pain me fire 10K rounds and not be able to reload any of the spent cases too.

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Old January 17th, 2013, 02:57 PM   #8
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While there, I read the article on .223 vs 5.56 ammo as well. http://www.luckygunner.com/labs/5-56-vs-223/#more-115

I'll bet much of that discussion applies to the .308 vs 7.62 as well.

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Old January 21st, 2013, 02:54 PM   #9
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I disagree with the authors in article text bubble:

Quote:
It is a commonly held belief that the coatings exist to provide additional lubricity, or “slickness,” to the steel cases. In fact, their primary purpose is to inhibit rust. As the United States Army discovered with a test of steel cased ammunition in the 1960s, uncoated steel cased ammunition was prone to rusting. Due in no small part to the coatings, we had no problems with rust during the test.
If you read that report, the rust on the lacquered steel case ammunition was worse than the uncoated! Coating on steel cased ammunition is to reduce rust and to break the friction between the case and the chamber, something that the authors ignored in their next referenced report:


Quote:
Beyond these differences, though, is it possible that extraction of Tula – and possibly other ammo – could be made easier by adjusting the pressure curve? A clever test conducted by the US Army’s TACOM and presented at NDIA in 2003 may have the answer. Titled “Understanding Extractor Lift in the M16 Family of Weapons,” the test concluded that the extractor lifts off the rim of the case during initial rearward travel, but that residual chamber pressure holds the case against the bolt face until the extractor returns to the case rim.
In the referenced report the Army had failures to extract with unlubricated cases but the lubricated cases extracted. Showing that even with brass cases, breaking the friction between case and chamber improves function.

The US Army developed teflon coating for experimental steel cases in the 1950's. At the time the cost of the steel cases and coatings were higher than brass cases so the whole experiment was abandoned. But considering how expensive brass is now, I wonder if the Army will be issuing steel case for 223 and 308 in the future.

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Old January 21st, 2013, 04:39 PM   #10
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The Warsaw Pact used steel for decades without problem - or at least the benefits outweighed the problems.

I prefer brass, but will shoot steel if needed. I'd be interested in trying Hornaday's steel offerings.

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Old January 22nd, 2013, 03:04 PM   #11
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Excellant. Thanks for the article.

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Old January 22nd, 2013, 09:08 PM   #12
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Great article thanks. I didn't know bi metal jacketed bullets would wear your barrel that much faster than copper jacketed.

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Old January 23rd, 2013, 03:18 AM   #13
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I don't know if it's the jackets or if its erosion from the powder or if it is a combination of both - probably the latter.

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