My 260 rifles, with my ammo, and me shooting will not be getting deer at 600 yards.
Not unless it was some hail Mary lucky shot.

Better 260 rifles, better ammo, better shooters can do 600 yards consistently.

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