Years ago when I was still in western Nebraska, enjoying the luxury of a prairie dog town on three sides of the house I was renting (sure didn't rent it for any of its other qualities!), I stopped in at the local gun/pawn shop
to pick up a couple boxes of .223 ammo (didn't reload yet then). The owner asked me what I was shooting it in, and what I was shooting at. I explained I was using it on prairie dogs out of a scoped bolt gun out to about 300-350 yds. 'Okay' he said, because he'd had to instruct his store 'help' (wife and daughter) to explain to shooters that they couldn't expect to use .223 ammo at longer ranges (like 400yds) because the bullet just went so fast that it had melted by the time it got out that far, and was no good. Seems he had a lot of customers come in complaining that they were missing Brer Coyote with their Mini 14s at 400-500yds, and just didn't understand about how the air friction heated the bullet so that the lead core melted by the time it got that far out from the gun...
Asked him "Doesn't a .22-250 or .220 Swift shoot the bullet faster than a .223?" "Well, yes, of course." "Can't you shoot further with a .220 than a .223?" "Well, yes, of course." "But if the bullet goes faster, shouldn't it melt sooner and have *less* range?" "...umm, well they must load them hi-speed cartridges with special bullets..." "You mean like tungsten or titanium?" "YES! Exactly!"
The next two times I went in there (forgive me, he was a twit but he had good prices) he apparently forgot the previous times, and started in on me all over again. The third time I was a bit less polite...