The last bull I killed was in Arizona at 743 yards with a 340 WBY. This was not my preferred distance, but all things considered it was the opportunity I had and the elk is in the freezer.
I do practice--a lot. If you want to see how you are at distance come test yourself here: http://www.competition-dynamics.com/
We also have some less intense, more local matches too. PM me if you are interested.
03 UZJ100 (2.5" OME/Slee suspension), LEDs, cross drilled and slotted rotors by PowerStop, and some other goodies.
75 FJ40 with stuff; and now weighing in at 4370 lbs.