I've found most of my casting needs have been met by two moulds from Lee': The 312-185-1R (for the .303 Brit) and the 324-175-1R (for the 8mm Mauser).
The .312 mould can be sized down for a .308 bore, and is easily paper patched up to .316 for my Mosin-Nagant. In a pinch it can also be paper patched up to .325" for an 8mm.
The .323 mould sizes down to .314" with a little bit of effort, but it shoots really well in my Mosin-Nagant. It shoots reasonably well from my M48 8mm Mauser, and the .323" bullet can be easily patched up to .330" for my M95 Steyr in 8x56r.
These two moulds have been so good for me that I'm planning on getting an extra mould for each and having a machine shop remove the gas check. RCBS makes a really mean looking .338 flat point mould, and I'm half tempted to buy it in spite of the fact that I might not even need it if I can get the accuracy I want with a paper patched 8mm Mauser bullet.