Threw together an old Savage J action($250 with stock & mounts) with a 708 barrel ($35 well used takeoff) I had laying around here, put a 3-9 Sightron mildot($100 used) scope on it for an economical walk-about gun. Ended up with IMR3031/120BT for a load and checkt drop charts against the mildot in the field to find they where very close but made notes of the difference. The plan was really not for a long range shot but was glad I had the info to get-r-done as it workt out to be 673 yards. Have shot prairie dogs dang near twice this far but this is the longest big game shot to date.
2 years ago I used a 300 Weatherby dialed to 1000 and got a shot at 135 yards.....All we can do is be prepaired or be patient=I aint patient