Well, a hunting rifle needs a good trigger, a good sighting arrangement, a sling and, if it's my shoulder in question, a good pad if it kicks much more than a 7 pound .308.
IIRC, Browning puts pretty decent triggers in their guns these days, so you're probably covered there.
That's not the sighting arrangement that I'd choose, but it's your money. High power variables are heavier, bulkier, and more expensive. If they were an aid to good shooting, they might be worth it, but in my experience, they're just the opposite. The high zoom makes targets look so close that it's tempting to take shots that one shouldn't. Additionally, it magnifies the movement in one's hold, which contributes to jerking the trigger, trying to get it while it's "on," rather than squeezing through as one should. After all, elk aren't small targets. A fixed 4x will make a 500 yard shot look like 125, and that's iron sight range. Astronomy scopes belong on varmint rigs and precision rifles, but they're unnecessary or even detrimental on a hunting rifle, IMHO.
I use a Ching Sling, myself, and find the three minutes it takes to mount an extra swivel eminently worthwhile. Failing that, those loops from rifleslinger look like just the ticket.
Given that there's an M in WSM, I'd probably swap out the factory pad for a Limbsaver or Pachmayr.
Otherwise, make sure it's not too long in the stock, that it mounts naturally, practice a bunch, then go bag an elk!
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