You're into a cartridge where only the most delusional of loonies would question the killing proficiency of your choice. Your cartridge & bullet choice won't be affecting this hunt. Rather, your marksmanship, conditioning, & hunting ability will have far more impact on whether or not you come home with meat.
1) Pick whichever bullet shoots best in your rifle, & load up a ton of 'em. Don't shoot from a bench anymore until after your hunt:
shoot from field positions. Grab your .22, and shoot several bricks worth
from field positions.
2) Get outside & hit the trail several times each week. Carry more & more weight with you over time. Stretch before & after.
3) Hunt the wind, don't make noise, & tenaciously maintain a positive attitude.
4) Send us pictures afterward.
FC