https://www.ballisticstudies.com/Kno...7.62+NATO.html
"The 150 grain Barnes TSX shows a definite delay in killing at impact velocities below 2600fps with rear lung shots. This bullet is best suited to game weighing between 90 and 150kg (200-330lb) and is adequate for use on heavier bodied deer up to 320kg (700lb). Wounding is at its most violent at impact velocities above 2400fps on lean game, width of wounding at lower velocities becomes more dependent on target resistance.
The 165 and 168 grain TSX bullets are best suited to large, heavily muscled game. That said, delayed killing occurs at .308 velocities and to this end, shot placement becomes very critical if on the spot kills are to be expected. The heavy weight Barnes bullets produce wide wounding out to moderate ranges... These projectiles are exceptionally deep penetrating bullets, capable of complete broadside penetration of Bovine sized game. The 180 grain Barnes is somewhat too long for optimum use (velocities) in the .308 Win."