Moose are actually easy to kill. Use enough ball to double lung them and if not chased, will be dead within 50 yards.
Chase after them and they can go far enough for you to lose em. They don't bleed out of the entrance hole and if you use a little ball,
it will not exit. My .69 didn't, however my buddy's .75 did until he dropped his charge to 120gr. 2F. Starting at 200gr. he was getting exits on quartering shots
with the 590gr. WW ball.
That moose of Taylor's is mounted on his living room wall.
Here's his guide, working on the rack in camp.
Here's another he got with that little .62.