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http://www.inetres.com/gp/military/infantry/rifle/556mm_ammo.html
According to this, M193 chamber pressure is 52,000 psi, and m855 is 55,000. I assume any quality AR can handle the pressure.
They also say:
I assume a Colt SP1 has the slower twist... and I shouldn't shoot m855 through mine?
STUPID QUESTION #2:
How do you tell the difference between the 2 types of M855 green tip? Cut one in half?
According to this, M193 chamber pressure is 52,000 psi, and m855 is 55,000. I assume any quality AR can handle the pressure.
They also say:
This ammunition should not be used in the M16A1 except under emergency conditions, and only at targets less than 90 meters in distance. (The twist of the M16A1 rifling is not sufficient to stabilize the longer projectile of the round).
I assume a Colt SP1 has the slower twist... and I shouldn't shoot m855 through mine?
STUPID QUESTION #2:
Cartridge, 5.56mm, Ball, M855, Lead Free
The M855 "lead free" ball cartridge has a bullet with a conical steel insert and a tungsten composite core in a copper alloy jacket. The intended use is to maintain environmentally "clean" ranges.
The cartridge is identified by a green bullet tip.
How do you tell the difference between the 2 types of M855 green tip? Cut one in half?