You are pretty correct. The reason they tightened up the twist was only to stabilize the M856 tracer. She is longer than the tracer we used before.
All spitzer type rounds will yaw when going from a less dense medium (air) into a denser one (flesh bone or jello), you are not going to stop it from happening.
What determines how fast it yaws is the length of the projectile in relation to its diameter velocity and mass.
From the M16s 20 inch barrel and M855 you will get (under normal conditions) core separation out to about 300 meters, and core disintegration out to about 210 meters.
From the M4s 16 inch barrel with M855 you will get core separation out to 240 m and disintegration out to about 150 m.
That is why it is advised to use MK262 in your M4, because from a 16 inch barrel its terminal ballistics are almost identical to that of the M855 from a 20 inch.
M855 will yaw in flesh almost exactly from M4 to M16, what causes it to come apart is the velocity it yaws at. The higher the velocity at yaw the easier it is for it to come apart.
But you do loose some intermediate barrier penetration.
As I said earlier those with M4s do not always get MK262 because of the logistical difficulty of issuing out two different types of ammo in the same caliber. That and a lot of people fail to read the MARADMINS that come out. So they just plain old don't know.
All spitzer type rounds will yaw when going from a less dense medium (air) into a denser one (flesh bone or jello), you are not going to stop it from happening.
What determines how fast it yaws is the length of the projectile in relation to its diameter velocity and mass.
From the M16s 20 inch barrel and M855 you will get (under normal conditions) core separation out to about 300 meters, and core disintegration out to about 210 meters.
From the M4s 16 inch barrel with M855 you will get core separation out to 240 m and disintegration out to about 150 m.
That is why it is advised to use MK262 in your M4, because from a 16 inch barrel its terminal ballistics are almost identical to that of the M855 from a 20 inch.
M855 will yaw in flesh almost exactly from M4 to M16, what causes it to come apart is the velocity it yaws at. The higher the velocity at yaw the easier it is for it to come apart.
But you do loose some intermediate barrier penetration.
As I said earlier those with M4s do not always get MK262 because of the logistical difficulty of issuing out two different types of ammo in the same caliber. That and a lot of people fail to read the MARADMINS that come out. So they just plain old don't know.