I've always used Sierra Game Kings for every caliber. I started loading for a 270 Win and found it likes 130 gr Accubonds better than the SGK. I just bought a box of NAB. I'm hearing that it's nearly interchangeable with the NAB for POI and group sizes. I'm yet to use them on game though. I have no complaints with the Sierras. They have always performed perfectly on game from 243 Win to 300 WSM.