If you load your own, 110 Hammer Hunter.
If you are referring to the Winchester Deer Season XP in 125g, if it shoots well for you at your max range, you should be fine.I put a 6.5 together for deer season this year but I'm not overly familiar with the caliber and was wondering what factory ammo everyone is using for whitetail. It's zeroed with Winchester 125gr whitetail that does shoot sub MOA @ 100 yards but it seems to me that a heavier bullet may be better. The farthest I'll be shooting is 400 yards on my Kansas trip. I'd rather not get into hand loads in case my luggage gets sent to Florida while I get sent to Kansas.