Archery has helped me a great deal over the years. Its like a handycap placed on ones self that trains you to be ready for that split second chance you get for a clean shot. Also vitals are viewed in great detail with every step the animal takes. This may sound strange , but archers will know what I'm talking about.
This trained mind set plays right into rifle shooting, and makes it easier by a long shot.

I would compare it to going from a slingshot to a 22 caliber rifle.
One must pick a spot as small as the mind will allow, this will pay off big time. Do not shoot at the whole animal , emagine a hair in front of the heart, and split it.
Long range shooting is a bit differant , as one also has to know the ballistics of the rifle cartridge, then can apply the same methods as for closer in.