Hi, My Dad was in the marines in the south Pacfic, From Mid 42 to late 45, he started on New Georgia and worked his way up. He carried the M1 Carbine. He said he loved it in the thick stuff. His reasons were it was light, quick handling, easy to operate, reliable and fast fireing.
In the South Pacific jungle islands noone had quilted winter coats and the fighting was from your nose onward and the carbine did it's job very well.
Korea the terrian was lots more open and the foe was winter clothed alot of the time so the carbine was under powered.
Dad still keeps a carbine as his house rifle, he lives in the mountains and at most would have a 75yd field of fire arround it. And at 80 he can still plug a mag in, rack the bolt and hammer it home, shoulders it and eats a man target up @100yds slick as butter.
As for shooting, with Georgia Arms 115gr soft pts it shoots less than 2" @100 from prone. It's a Universal with a Gi recoil spring installed, he said the old spring was too weak. Over several thousand rnds, it has done it's job, and been a favorite of all who shot it.
Is it a agreat choice today, no, But then again, if there's work to do, I'll take the 2002 F-150 over the 1940 F-10 Ford pickup truck. JB