I suggest you use the bullet most accurate in your rifle. Might try some 180 gr Nosler Partitions in Fed Premium or Win Supreme 180 gr Failsafe. And there are many others out there which would be suitable as well. The 165 gr you presently have would kill an elk, so if it shoots the groups you want, use them. We are all different, and I like heavier bullets, so I would find a 180 load that shot good and use them, but you shouldn't hesitate to go with the 165s if you like em'. Hope you get an elk!