The gun is a 300rum ,shooting 180gr. ttsx . Sighted in at 200 yards ,say the bullet drops 36" at 500yards on level ground at 2,000 feet elavation. I have a goat at 500yards I am at 2,000 alt, The goat is above me at a 45 degree angle . What would be the drop at that shot? Would you just hold 35 inches high or is there a lot less drop?