I shot a big buck at 625 yards with 7mmRM
I shot a tiny doe at 629 yards with a 6.5-06.
Those were hail Mary shots with guns I had only practiced at 600y.

Typically for at dawn with no wind, almost all the short actions I build are good for 400 yards and all the long actions are good for 500 yards.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps