RE: Double lung shot
DaveH - I have to agree with SJHunter. I have made many heart shots that failed to hit lung. Whether or not the lung gets hits depends on a number of variables. Was the lungs fully expanded with air, or did it just exhale? Was the head down, or up? It makes a difference in regard to the lungs position relative to the heart at the moment the arrow hits.
A number of my heart shot harvests, both bow and muzzleloader, have been directly below the "mushroom cap" line at the artery end. No lung damage. My experiences = less than 30% have hit lung w/ heart.
Conversely to the scenario I posted about my buddy's heart shot 12 in Alabama, the last heart shot I made was a large 6-point in 2001. 100 gr. Vortex dead center through the heart at 22 yards; took a couple of steps, laid down, then fell over on his right side when he passed-out. No lung here either.
That shows me the contrast in how different animal react in varying situations.
Shoot often - Hunt always