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3/26/2011 1:33:51 PM

What's wrong with banning teflon coated bullets? From my research into body armor, a low friction bullet would have more ease of slipping through and pushing apart kevlar threads that make soft body armor.

3/26/2011 6:22:22 PM

everything I've read says that the teflon coating has no effect on the bullet's impact - only reducing wear on barrels. when teflon coated bullets came out, it was the type of bullet and ballistics that caused them to penetrate body armor, not a protective finish on the bullet.

in tests with these rounds, the bullets penetrated better, but damaged barrels, thus a soft, teflon coating was added so that it would deform to the barrel rifling instead of damaging it.

3/26/2011 6:42:46 PM

Teflon = better penetration is movie garbage (some movie with robert dinero i think).
Yes, this movie garbage, fueled by some media led to the banning of teflon coated bullets.

Penetrating kevlar is all about sectional density.

3/26/2011 9:03:49 PM

Some steel and tungsten bullets were teflon coated to reduce barrel wear (as opposed to conventional lead bullets, which are soft enough so as to not unduly wear barrels). A tungsten bullet can penetrate soft body armor because it's tungsten, not because of any sort of coating it might wear. At any rate, teflon coating is strictly to reduce barrel wear.

Incidentally, pretty much any centerfire rifle will punch right through a vest, and a few handgun rounds will (without anything crazy like tungsten or steel-core bullets).

3/26/2011 9:09:17 PM

Depends on the level of body armor too; shooting and seeing IIIA shot is fun

[Edited on March 26, 2011 at 9:16 PM. Reason : ...]

3/26/2011 9:15:40 PM

A simple 22 mag will go through IIIa if it has enough velocity (either be close or be fired from a long barrel).
Lets not let the legislators or the brady bunch know.

3/26/2011 9:43:12 PM

Yeah, I did some testing on Kevlar for a senior design project. One of the things I found in research was that often a projectile or other instrument (knife) would have better luck penetrating body armor if it could push aside Kevlar fibers to make a hole rather than directly breaking every fiber in its path, in addition to bullet form, concentration of pressure, all that crap. We too found that 22 rounds would easily penetrate most armor we put up due to its small diameter.

This included IIIA equivalent layers of Kevlar...we had a IIIA police vest, but I didn't want to test it since it was cool to have . Instead we tested raw woven Kevlar that was donated by DuPont :3. Wasn't the ideal set up, but was the best we could do on the short time table we had.



I'm guessing Teflon coated bullets reduced barrel wear due to decreased friction? My company has a technology that does just that...hmm

Quote :

"The federal ban on pistol armor-piercing ammunition uses only the composition of the bullet's core to determine legality.[2] However, many states have legislation restricting various kinds of coating materials. For example, South Carolina state law specifically bans "ammunition or shells that are coated with polytetrafluoroethylene (Teflon)".[3]"

Anyone happen to know what kinds of restrictions are out there for "coatings"?

[Edited on March 26, 2011 at 10:19 PM. Reason : lkj]

3/26/2011 10:05:28 PM