I agree with the Sierra 85gr GameKing HPBT. I have had excellent results with them. I have found that this bullet works very good with several powders, my favorite is IMR 4350.
I first went to this bullet for my 243 a few years back when my wife needed some ammo & I picked up a box of Federal Permium with this Sierra bullet (they were out of the 100gr SPBT which I had been using). I couldn't believe how accurate her Weatherby was with this "little" factory load. So I bought a box of the 85gr HPBT Sierra bullets & haven't looked back.