Of the 4 30/Otters I've owned,all liked 180gr bullets. Actually,they prefered them over any other weight. I load them on the warm side and that's where they really start to shoot well. Nosler PTs,Hornady Spire pnts,Grand Slams,Hot Cores,Ballistic tips and Combined Tech Ballistic Silvertips. Most over a stiff charge of IMR 4350 or RL22. The 4350 back int the 1980s and 90s,and RL22 later on. If I had to carry only one rifle,of non-magnum proportions,it would be an Otter Six stoked with 180gr Nosler Partitions.