There is no need for you to change anything. The Remington Core-Lokt has taken more deer than any other bullet. If your gun shoots well with the 150's I would change a thing. I hunted for several years with a Winchester model 100 in 308. All I used was 150 gr. Core-Lokt's and I've never had a deer get away with them. As always shot placement is critical as it is with any bullet.