Well this one is NOT in the south china sea. It's in my North America United States Safe.
The M1 carbine like any other firearm has it's place in the spectrum of shooting, collecting, historic WWII memorabilia, etc.
I just shoot paper with mine. Vary the range, shoot offhand is a lot of fun.
I used to shoot pistol silhouette targets with mine off hand. A clip full of 15 head shots no problem at 25 yards, similar to your target. I have pictures somewhere, to lazy to find them and figure out how to post them.
I have one Garand left as well. A minty unmolested 1944 Springfield. I used to shoot it some and it was a head shot rifle as well. Retired it from the range. It's just for looking at now. Somebody 50 or 100 years from now will thank me for that.
I don't think there was ever a better platform to shoot off hand from than the M1 Garand.
That gun with receiver sights can make any average shot with average eye sight a 200 yard sniper.