Question about modern ammo

[Stump70]

There is a guy on the CMP forum who has done a ton of pressure testing on period and modern ammo in the Garand. Basic conclusion is that any modern 150g ammo puts less force into the op rod and bolt than the original 174g M1 ball. And most current factory 150g is not hotter than some of the snappier HXP M2.

I read this thread. Very good info and dispels alot of myths.