True. Nothing like the hitting power of a 30.06 round to drop a bad guy in his tracks.
My uncle was drafted into the Army just as the Korean War broke out. He was in a Recon platoon (13 Jeeps, he was a .50 caliber gunner) and was part of the break-out force from the Pusan Perimeter following Inchon. He ended up going all the way to the Yalu River, literally at the tip of the U.S. Army's spear. When the ChiComs counterattacked, his platoon was surrounded and had to slog it out hand-to-hand with the Chinese hordes.
At one point, a ChiCom soldier zeroed in on my uncle (who subsequently won the Bronze Star for his actions) and charged him with his bayonet (on a Mosin-Nagant rifle). My uncle was only armed at that point with a M-1 paratrooper carbine. He said he pumped about 10 low-power .30 caliber rounds into the ChiCom, but the guy would not drop, and kept coming at him, screaming like a Banshee.
Out of ammo, my uncle looked around and picked up an M-1 Garand dropped by one of his dead buddies. He turned around, and fired it at the ChiCom soldier (who was almost on top of him), and killed him instantly.
Ultimately, my uncle's platoon was wiped out and he was the only survivor. He was shot between the eyes at long range by a ChiCom but the bullet was spent and did not penetrate his skull, just causing a bloody flesh wound to his forehead. He ended up playing dead for several days in his freezing fox hole, surrounded by all his dead buddies and the ChiComs, who he remembered jumping across his fox hole at night, as they continued their attack.
He was rescued several days later when a U.S. Army counterattack took back his position, but the events of that particular week pretty much scarred him for life.
True story.