I believe this old argument was started at least 60 yrs ago. At that time bullets of either type were not as good as todays technology. An example would be, if you were using a 30-06 for whitetail with 150 gr and you wanted to shoot an elk, you would choose a 180 gr because they wouldn't expand as quickly. The same is not true today to a certain extent. Now I can use a 165 gr bullet such as a Hornady spire point for deer then switch to a 165 gr Accubond for elk. A short version of the cast bullets is, we had roundnose, then SWC, and finally LFN and WFN. The latter being the best for hunting. I agree with all the advise given above. Match the bullet to the game hunted. Eventually, I think we all learn premium bullets are the best insurance for the hunt!