New Cartridge Developments and Implications for Dismounted Infantry Soldiers

[LRRPF52]

And now you push into a heavier weapon, with longer bolt travel requirements, with less available space on my kit for mags, in order to reach 6mm-6.5mm BC's that can be used already within the existing system dimensions of the AR15 family. Like I said, going with .277" was a really bad idea from the start, and the reasoning behind it was patently fraudulent. Trying to pass off a varmint bullet as OTM to career ballistics engineers was one of the first major mistakes. It's a dead end. If people knew the back story, they would laugh.

A 6mm SPC or 6.35mm SPC would have been much better. 6.5mm run at lower pressures gives you the ability to get longer barrel life, whereas 6mm's are renowned for poor barrel life. That has significant implications for training and logistics, which I have personally seen manifest especially in the sniping community where we had to send our M24's off to be re-barreled by Remington at a certain round count.

With the .300 Win Mag in the Sniping Community, it has serious throat and bore wear considerations that severely limit the ability to train with the gun, especially after the introduction of the newer load that tries to be a .338 LM. Pressure on it would make Roy Weatherby blush.