Seems like we have this debate every so often. The "Core-lokt" design has been around for a long time. I've thought it was designed because when the 30/06 came out, the lead bullets of that era were "blowing up" or "fragmenting". I also thought this is where the term "High Velocity" came from that seems to be on the cartridge boxes. The 30/06-- 180 grain bullet is 2700 fps according to Federal's catalog. IMO, we have pushed the envelope again---the magnums will push the same bullet almost 300 fps faster. I think with the 3000 fps, you need the newer "premium" bullets.

Back to the 30/06. It's been my rifle for over 20 years hunting elk here in Colorado. My bullet has been 180 grain "Core-lokt" for those 20 years, with the occasional Winchester "PP" or Hornady "Spire Point" and have never had a problem. I don't want to brag or boast but I've killed 16 & the guys in my camp probably another 16 or so elk. We hit them on the shoulder, both high & low, behind the shoulder, quartering away or incoming. All with the plain jane bullets---with never a problem.

Now with that said---If you like "premium bullets" & feel that extra confidence in using them-----then you should. If you shoot a magnum or rifle that pushes that 3000 fps (270 Win) then you should use "premiums".

In all honesty & not trying to be a smart ass. Shot placement plays a BIG role. A 180 grain "Core-lokt" out of a 30/06 in the lungs is better than ANY premium bullet out of any magnum rifle in the paunch.