As far as killing a lion goes, they are pussy cats and don't take much more than a deer or black bear with a good shot. Cape buffalo is an entirely different matter. Now if you have a month to try and get into the perfect position to shoot a buff at 30 yards then by all means go for it. If you get lucky and get into perfect position in 7-10 days go for it but if you're looking at that bull in the thick stuff and aren't even sure where the shoulder is then you better be very careful with your next move.