The .700 is interesting purely because it's the largest cartridge (aside from the bore rifles, which produce far lower velocity and I see the .700 as more impressive) supported and offered by one of the classical Africa arms giants. It is overkill which doesn't even need to be said, and my personal fascination tops out at .577 Nitro, for which I've been slowly assembling a collection of components. Recent purchases have sidetracked the .577 for a long while but it's still on the mind. Unless you're buying a classic or a product of a master, I don't really see the point of settling on the .700, you'd just be making life difficult for yourself in barrel blanks, components, even dies etc. Choosing to build a more conventional choice such as a fast .577 wildcat will allow the use of more standard actions, more available bullets and molds, yada yada yada. You'll also produce as much energy as you desire, and can make more power than factory .700 Nitro loadings, should the urge arise. I wouldn't marry your dreams to the .700 as in an affordable rifle, it really isn't a .700 Nitro, it's another wildcat monster really. What makes a .700 Nitro is where is comes from, Holland & Holland or other silly expensive makers, and it remains a toy for those with too much money who enjoy being beaten for amusement. Remove the beautiful rifle and there are far more sensible ways to simply beat yourself.