Nice goat! I also recently shot an antelope with my 7mm rem mag & 180 hybrid at about the same range, first animal down with this rifle built too. Looked over about 60 antelope in 4 different groups and settled on this one. The first shot was 675 and slightly quartering towards me with the pencil hole entrance in front of the on-side shoulder and the exit also just in front of the shoulder. He was very sick and moved about 60 yards and just stood there, so I put a second one in him at 735 yards right through both shoulder blades, he hit the ground like a pancake on the impact.
Surprisingly the first shot didn't drop him, it was very close to the spine on entrance but I think just didn't open fast enough to shock the spine. Second shot did ruin some meat on the shoulder but not nearly as bad as the pics make it look. I think this bullet is a little stout for antelope, which is exactly why I chose it for my deer & elk load. I will be shooting goats with the 6.5x284 in the future but wanted to try the new 7mm & Huskemaw scope out on an animal finally. Really liking the scope so far, put one on the 6.5 as well so should have some good feedback in a year or so about how they handle abuse.
Oh, and I had the entire shot at 735 yards on video with my phone scope, but my phone ran out of storage and stopped recording about 3 seconds before the shot!!!