[The KG9 Kid]

"... The 62-gr bullet in the SS109 has a small steel penetrator, while the 55-grain bullet in the M855(most common issue) is mostly copper jacket with a small amount of lead."

I think I'd better correct this:

'SS109' isn't a cartridge, but is the NATO standard for a hardened 62gr projectile; SS109 is just the bullet.

M855 is a loaded cartridge that uses the SS109 NATO-spec projectile and is intended for 1x7" twist barrels. There is another type of M855 that's lead-free using a projectile made of a copper-nickel and tungsten alloy, but it's generally only used on marksmanship ranges if it's even used at all anymore.

The milspec cartridge with the 55-56gr projectile that has no penetrator component and is just a FMJ lead slug is M193. That's the old Vietnam round intended for the M16/M16A1.

[Pistolshot]

THAT'S IT.....I knew I had the two m855/m193 mixed up.

Thanks.