While I doubt the dollar claim, I kinda support the veracity of his claim if he's talking about 200 yard hits on soldiers. Kinda suspicious about his estimate of 300 yard distances, though.
I'm basing that on a little bit of range experience.
Got into a jawing match with my principal hunting pard's grown son. The outcome was a pair of
standard B-27 silhouette targets at 200 yards, 10 shots apiece prone, all loading done while prone.
Based on prior shooting, I opted to use the "head" as an aiming point and let the balls fall where they would. Dunno his aiming point. I was shooting a GPR 54 with a receiver sight and he was shooting his usual 50 cal TC Hawken with standard sights.
Once the smoke cleared and we walked downrange, I'd have spoiled the guy's reproductive potential rather than an immediate kill, but there were 10 holes in the black in a group good enough to surprise me.