Shot a handful of bulls with a 300 win mag and 180 partitions, and one with the same rifle and speer hot cores. Predictably the partitions with that cartridge were very effective with a couple animals dropping at the shot and the balance only moving perhaps 25 yards. (I am traditionally a lung shooter, from way back!). The speer did the job but did not hold together well at all and lacked the penetration I was used to. I'd not use that combo again.
