We used to qualify with that weapon out to 600yrds using just the open sights. Of course we used "man sized" targets in the Marine Corps.
I still have a M1 Garand that I absolutely love to shoot!
I want to pick up a M1A soon but can not get myself to spend 1500-1800 for one yet.
Edited to add, Yes I did my first two enlistments in the Marine Corps before I enlisted in the Texas Army National Guard. Now that should explain the "SFC" part, Semper Fi!