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Mexican highway robbers stole 7 million rounds of US ammo
unite for individuality:
--- Quote from: Elderberry on July 21, 2021, 02:02:44 am ---I don't have a problem with purchasing Non USA manufactured ammo. Just a few of the foreign ammo makers I've purchased products from are Lapua, Nosler, Fiocchi, Sellier & Bellot and Aguila.
--- End quote ---
Most of the ammunition manufactured in Russia
only APPEARS to have copper jackets.
They are actually STEEL jackets!
Very thin steel jackets, but still. steel jackets.
Firing one or ten rounds of it will not significantly erode the rifling in your barrel,
but firing a hundred or a thousand rounds of it certainly will!
You can test any ammunition you own with a magnet.
See if the bullet end of the cartridge is attracted to a magnet.
thackney:
--- Quote from: unite for individuality on July 26, 2021, 04:09:06 am ---
Most of the ammunition manufactured in Russia
only APPEARS to have copper jackets.
They are actually STEEL jackets!
Very thin steel jackets, but still. steel jackets.
Firing one or ten rounds of it will not significantly erode the rifling in your barrel,
but firing a hundred or a thousand rounds of it certainly will!
You can test any ammunition you own with a magnet.
See if the bullet end of the cartridge is attracted to a magnet.
--- End quote ---
Do you have a link showing steel jackets on the bullets and not the casing? Or are you thinking of steel core bullets?
http://www.youtube.com/watch?v=-vqs1ne1xws
Elderberry:
Brass vs. Steel Cased Ammo – An Epic Torture Test
Lucky Gunner Labs 9/21/2019
https://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/
--- Quote ---There are two major types of centerfire rifle cartridges available on the market today:
• Those which are loaded with steel, and
• Those which are loaded with brass
This seemingly simple variation has caused a never ending stream of argument, discussion, speculation, and questioning from new and seasoned shooters alike. So, our team set out to test and determine what differences you can expect when shooting brass vs. steel cased ammo in this epic torture test. Complicating the conversation are other variables that typically get lumped into the argument without proper segmentation, such as:
• Different coating options available on the steel-cased ammo (lacquer or polymer)
• The different projectile loadings available (copper jacketed lead, the bi-metal coating that most Russian manufacturers use, etc)
• The different propellant (gunpowder) burn rates
Our team decided to try something ambitious and daunting: to provide the best resource and data available to answer these questions once and for all through objective experimentation and observation.
We realize this is a lofty and borderline arrogant goal. We’ve done our best. Please keep reading to see if you agree.
Brass vs. Steel Cased Ammo Test Summary
• We acquired four identical Bushmaster AR-15 rifles. We chose the Bushmaster MOE Series AR-15 because it’s a widely available, affordable, and mass-market. Our team didn’t want something too cheap and of lower quality or something too expensive and of high quality since our goal is to help the most number of people.
• We acquired 10,000 rounds each of the following ammunition (new production):
o Federal 55gr – Brass-Cased – Copper Jacket
o Wolf 55gr FMJ – Steel-Cased with Polymer Coating – Bi-Metal Jacket (steel and copper)
o Tula 55gr FMJ – Steel-Cased with Polymer Coating – Bi-Metal Jacket (steel and copper)
o Brown Bear 55gr FMJ – Steel-Cased with Lacquer Coating – Bi-Metal Jacket (steel and copper)
• We paired each ammunition type with a specific Bushmaster AR-15 and then fired all 10,000 rounds of it through that particular carbine (except for Tula; more on that below)
• We systematically observed and tested various things, including (more details below):
o At the start: accuracy, velocity, chamber and gas port pressures, chamber cast
o After 2,000 rounds: accuracy, velocity
o At the 4,000 round mark: accuracy, velocity
o After 5,000 rounds: throat erosion, chamber cast
o Af the 6,000 round mark: accuracy, velocity
o After 8,000 rounds: accuracy, velocity
o After 10,000 rounds: accuracy, velocity, chamber and gas port pressures, throat erosion, extractor wear, chamber cast, barrel wear
• We logged every malfunction of every rifle-ammo combination
• The rifles were cleaned according to a preset schedule and temperatures were monitored and kept within acceptable limits (more below)
• We sectioned the barrels and otherwise made unique observations after the test was complete
If you’re interested in any of the following, you’ll find observations, data, and further details below:
--- End quote ---
Elderberry:
--- Quote ---Bimetal Jacket Impact
As indicated by accuracy testing, the steel cased/bimetal jacketed ammunition caused accelerated wear to the inside of their respective bores.
The barrel of the Federal carbine had plenty of life left after 10,000 rounds at extremely high rates of fire.
We subjected the Wolf and Brown Bear barrels to the same rates of fire and they were completely “shot out” by 6,000 rounds.
--- End quote ---
sneakypete:
--- Quote from: Elderberry on July 26, 2021, 01:09:04 pm ---
Bimetal Jacket Impact
As indicated by accuracy testing, the steel cased/bimetal jacketed ammunition caused accelerated wear to the inside of their respective bores.
The barrel of the Federal carbine had plenty of life left after 10,000 rounds at extremely high rates of fire.
We subjected the Wolf and Brown Bear barrels to the same rates of fire and they were completely “shot out” by 6,000 rounds.
--- End quote ---
@Elderberry
I see plenty of mention of bore wear with steel cased ammo,but not a word about chamber wear. Since an oversized chamber due to wear can cause a steel-cased round to explode inside the chamber and maybe blind or kill the shooter,IMHO,chamber wear/erosion is a MUCH more serious concern that bore wear.
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