czech 7.62X39 bullet question

[tristanium]

i bought a case of czech surplus ammo on stripper clips yesterday.
what's in the bullet? why is it magnetic?
those are forbidden at my range,they say it's steel bullets.
i'm not sure they are right so any explanations would be welcome.

 

[Stevo]

Czech M43 is copper over a steel core.

 

[fiddler]

some place do ban shooting steel core, often because it forces shooter to buy the range ammo. its not steel core as in "armor piercing" , its steel as in its cheaper to manufacture.

 

[squirrelnuttz]

I was pretty sure that these Czech rounds are lead core, with a copper washed steel jacket.....

 

[tristanium]

I was pretty sure that these Czech rounds are lead core, with a copper washed steel jacket.....

that's what i thought too.
a guy told me the police came to the range for inspection and they found holes in some bullet stopping metal plates (i don't know what thickness they are)at the end of the range,they said this kind of ammo was the problem.so now we can't use it anymore till they find another solution.
this is the ammo i'm talking about:

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[Baribal]

They used steel in the core design to make the bullets longer beyond other reasons. These bullet have a lead nose (the steel core nose is flat) infront of the steel core. The core is also "welded" to the jacket by a lead film. While they can sometimes perforate, the main complaint is ricochets. A sand backstop usually hold them easily.

 

[CanAm]

The code on that box indicates tombac plated (bimetal) / steel core.

 

[jcpal]

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Oblique view of a steel-cased 7.62×39mm FMJ cartridge.
7.62×39 shown along side other cartridges. From left to right: 30-06, 7.62×39, .454 Casull, .45 Colt, .357 Magnum, .38 Special, .45 ACP, 9mm, .380, .22 Long RifleThe original Soviet M43 bullets are boat-tail bullets with a copper-plated steel jacket, a large steel core, and some lead between the core and the jacket. The cartridge itself consists of a berdan-primed, highly tapered (usually steel) case which seats the bullet and contains the powder charge. The taper makes it very easy to feed and extract the round, since there is little contact with the chamber walls until the round is fully seated. This taper is what causes the AK-47 to have distinctively curved magazines (helping to distinguish AK-47s from AK-74s, which feed from a much straighter magazine). While the bullet design has gone through a few redesigns, the cartridge itself remains largely unchanged.

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[SandRoad]

I was pretty sure that these Czech rounds are lead core, with a copper washed steel jacket.....

The Czech are a copper plated steel jacket over a steel core.

No solid copper jacket, no lead core. The 2 part steel bullet design allows the jacket to "move" ie deform in the rifling, where a soilid steel bullet would take a lot more force to swage it to the barrel/rifling.

 

[Kayser Sose]

Yup, where I do most of my shooting come the dry hot season these rounds are not permitted due to sparking, as in when they hit the butts.

Apparently (talking to the caretaker) they had a conservation officer up to demonstrate at night; apparently, lots of sparks covering a huge area... having once set a dry lawn on fire (ah, youth...) I wouldn't want that to happen at my club.

 

[sunray]

Steel cored or steel jacketed is what makes 'em magnetic.
"...found holes in some..." That's why your club doesn't allow 'em. Pock marks are there becases the steel isn't hard enough for FMJ's. It's not the steel that causes it. It's the thick FMJ jacket, steel or not.

 

[Craig0ry]

Is it not copper washed steel over a steel core? If you scrape the copper on the bullet you can see it is steel and not copper