In the FWIW dept; wolves killed by rifles in Alaska probably succumb to the 223 round more frequently than by anything else. It, up through the 25s, are probably the best numbers to use if you want a sleek pelt. Wolves are rarely a pick-your-shot type deal; you take what you can. A 150 Core-lokt from a 270 can make a real broadside mess of the hide. The gusto of a bullet driven by a 340 wouldn't likely improve the outcome. OTOH 150 BTs in the 7mm-08 and 30-06 flavors have been handily stopped by wolves when run in a more diagonal direction. By law you must use a CF rifle on wolverines in AK. However, I suspect you might get a wanton waste summons if you presented a two-piece wolverine for sealing.
Sometimes, the air you 'let in'matters less than the air you 'let out'.
