Try the 160 swift a frame that remington offer, seeing you've had success with their ammo in the past. I wouldn't reccomend the 140gr Corelokt Ultra as the next choice to try though..not what I would consider a good choice for the likes of elk. Others you can try are:
Federal Premium 140 or 160 Nosler Partition or TBBC's & 160 Barnes TSX.
Winchester Supreme 160 CT Accubond (have seen whereCT does shoot better thanNosler (and vice versa)...so you never know! 140 or 160 gr Failsafe.