I would give this a try it delivers 2000lbs of KE to 300 yards. I would not be worried about using the 270 with a 150 grain Nosler partition bullet. The fishing guide I use in canada is also a moose guide and he has recommended the 270 with Nosler partions or Bear Claws to his clients for many years with good results.

http://www.doubletapammo.com/php/catalog/product_info.php?cPath=21_58&products_id=218

You can buy this from midway