Thats true. A moose may not be impressed when first hit even with big calibers. The often act like there was no hit at all and just walk off. They usually don't go far though. The last one I saw shot was hit very well with a Sako 300 Win Mag. The critter didn't even flinch and my buddy hit him two more times before he just walked off around a river bend then tipped over dead. This one had a 66 inch spread.

Should work fine for you. 300 win mag doesn't really have all that much on a 270 WSM @ 300+ yards until the 180 gr range.

I shot a42" at 300 yards with a 30-06, and it acked drunk at first, and went back feeding, I was getting ready put another in it, and my guide said don't worry about it. After a min, it fell down taking 6" trees with it. Hoofs in the air

A big bull WHAT?? Moose? Elk? Elephant?? Moose, yes. Elk, for sure. Elephant? A little on the light side...... OK! MOOSE!! MOOSE are easier to kill than elk. But most moose will not drop at the shot, no matter what hits them - they just stuble off and die pretty close to where they were when shot. Unfortunately, given their propensity for swmpland, they sometimes stumble out into a creek or pond then drop in the mucky water! Ugh!!

You will of course, have to place the bullet correctly. But that's true no matter what you're shooting!