Ive shot half the bore life of my 7 mag with them and it is still sub moa. All I can say is stick with them or dont use them at all. Mixing with plain jacketed bullets makes cleaning the bore hell! But shooting just nbt will keep things simple... just clean regularly and youll be fine.
On the performance end they are my second choice for good ballistic coificient relative to price. They are a little thin for elk or moose but I'm sure there are people who would dissagree with me. They dump energy well with some shed weight. I dont know if it is true but I heard that nosler puts thicker jackets on the 180gr .308 dia and up bullets but better research that before taking on big game.