I’ve explained mechanically why i think that kind of range is bad. Narratively it’s also not realistic, which is great as it means the flavor and mechanics can work together instead of against each other.1) Just because you think it is ridiculous has no bearing on it existing or making perfect sense within the fiction. Seriously, fantasy is full of shots way more insane than that.
2) How the heck are you getting 1200? Sharpshooter doesn't double your range?
2) I had gotten the 3e feat and 5e confused.