[Ice Fishing Maniac]

IMO, the 180gr bullets are the best choice for the 300WM. My first suggestion for factory ammo is Winchester Suporeme Accubonds or the WS Elite XP3's. NExt would be the Federal Accubonds or TSX or MRX's

As mentioned, try some different ammo, as one 300WM rifle may/will shoot differently than another in the same manufacture.

My buddy had the same issues (10 years ago) with TB Bear Claws...good at 100, but all over and dropping really bad at 200..not even hitting the paper. We tried the bullets I used at the time ( Partition Golds 180gr) and the rifle shot almost as good as mine...both are Sako m75ss 300WM with Leupold Vari-X III scopes. Since 2004 we have been shooting the WS Accubonds, and now I shoot reloads since 2005 and developing loads for my buddy's rifle.