@sgt_zim...While I like heavy for caliber rounds, I also believe in some combinations being more optimum (sometimes just by coincidence rather than by design). So, say with monolithic bullets like TSX or TTSX in .30 caliber and for longer ranges, I'd say the 150/155 gr for 308, 165/168 gr for 30-06 and 180 gr for .300 WM and push them fast. Then you have fast, hard hitting and penetrating rounds for any normal hunting distance, including the longer ranges past 300 yards. When I see people pushing 180s in 308 (in target shooting they now go over 200 gr), I know they fly well, hit hard enough but ballistically do not buy you much over heavier bullet in bigger caliber. In that case I'd prefer the bigger caliber then. And then if you go a bit lighter in bigger caliber, you still get heavier bullet but now have the flatter trajectory too. But hey, there is definitely nothing wrong with heavy bullets in any caliber. I still like 175 gr in 7x57, yet I have to admit the 139 gr SST just works and it definitely shoots flatter. The thing is there are so many variables and choices these days one can make almost anything work or have at least couple of rounds in any given caliber (slower and heavy hitting with lighter, faster, flatter shooting) for any hunt. It depends on what you plan to hunt, how and where. I also tend to stick with only 1 or two bullet weights in any given caliber as I believe in "less is more". I know I can get 110 or 125 gr bullets in .30 caliber for my 30-06 but why. If I wanted to shoot that weight of a bullet, I'd step down in caliber. So, for me at least, I try to keep it simpler and use say 270 and 300 in .375, 250 and 286 in 9.3, 180 and 200 gr in .300 WM, 165 and 180 in 30-06, 150 and 165 in 308, 139 and 162/175 in 7x57, etc., etc. And now looking at this list even that sounds like too many choices. Oh what horrible world we live in.
Oh yeah, this is not to say there isn't that exceptional 180 gr load for .308 at all...I just kind of generalized how I look at things in order to hopefully explain where I'm coming from.