The newer BT's should be fine for deer at &mm Velocities. The early ones had problems but the have gone through 4 updates since they came out. I would use the heavier ones< Probably the 150 grain but they should do fine. I use the BT's in almost every caliber and I think they are a near perfect deer bullet. In most calibers, the lightest BT's are intended for varmits and small game and the heavier ones are intended for big game. That is from Nosler and not just my opinion.