Nice bull, but would not be too quick to blame the bullet. for poor performance. Was it a HUNTING bullet or a match bullet? What does Berger list as the minimum opening velocity of the bullet used, and what was the estimated velocity of your load at 700yds?

Not familiar with your cartridge, but I would imagine the bullet would still be at or above the magic number of 2100fps, that many hunting bullets need to open reliably. This is the number one concern I have when thinking of long shots on game, what is the maximum yardage I can use my chosen bullet, and still get reliable expansion.

Sounds like you were fortunate to be able to get the second and third shots off, otherwise he might have been hard to find.