.30-06 with a heavily constructed 220 gr bullet at 2400fps. A winning combination for many years. 2 nd would be the .35 Whelan with a 275 gr at 2400, again heavy construction. You could drop these weights a bit if you use Barnes TSX but use one on the heavy side.my Yukon moose was on the larger size, I used a 300wm and 1st shot broke back second in the withers. 200 yds
I would with a 06 bolt face not go the 280ai ( I have used and loved one)not enough bullet weight, I would go 35 Whelan or a std 30-06
Bob
My friend with the 270 hunted his moose in central British Columbia in the 1960s. And the 270 was a Winchester 54 carbine with a 20 inch barrel. He grew up in northern Alberta in the 1920s so he was an expert stalker. He taught me a lot about rifles and hunting.having read these responses, I see a lacking of concern about a key factor,
all moose are not the same - geographically, from the smaller US weigh of 400-600lb not much different than Elk, if you go into Ca, yokon, Alaska and other areas they weigh up to 1200lb. much more stopping power needed.
So, the ? where will you be going moose hunting, what are the species there and what weight would you expect to encounter.
that can put some major light on some of these recommendations.
270 is fine for the lighter US and western states moose, BUT don't bet on it if you go elsewhere.
Bob
Bet your friend was also an expect shot who was also very patient and waited for a good target opportunity. Chances are he had plenty of time and opportunities and was not looking for a large trophy bull. A well known 270 is fine in his hands, as is most any other caliber he would choose. Look at the opinions here with that in mind.My friend with the 270 hunted his moose in central British Columbia in the 1960s. And the 270 was a Winchester 54 carbine with a 20 inch barrel. He grew up in northern Alberta in the 1920s so he was an expert stalker. He taught me a lot about rifles and hunting.
One of the largest Kodiac bears killed was with a 30-06, 220 gr bullet. One shot in the neck at 70-90 yds. Many years ago.He shot his share of big Bulls, but he was primarily a meat hunter. At the time British Columbia authorized residents to shoot one moose and three deer. It was a poor year when he didn't fill all his tags.
All I'm saying is that a 270 or 280 or 30-06 is adequate for even big moose. About the only game in North America you need a big boomer is for Grizzly it Kodiak bears. It may be NICE to have a boomer for moose or elk to extend your range but you really only extend it 50 yards. Whether it is worth it is up to the hunter in question.