If you know your velocity and run the numbers in a ballistics program, you will see that at 600 yards, the .260 has plenty of horsepower for deer. I have not shot a deer with mine at that long of a range, but I did smack one at 430 last January, with a 129-grain Interlock-drt. If you like Bergers, then use them and you will do fine.

You did not "seen" anything, you "saw" it.
A "creek" has water in it, a "crick" is what you get in your neck.
Liberals with guns are nothing but hypocrites.