Re: 338 Lapua Builder
338 recoil isn't bad at all; if you have a decent brake on the thing it's no worse than shooting a 30-06 (and with an effective brake and heavy gun it's a lot nicer than the 30-06!).
I think what drives most people away is the cost of ammo and even the expense of reloading. Buying in quantity my 308 reloads are a little over 40 cents each, my 338 reloads are around $1.25 each.
Lots of good builders out there, find someone you like. Mike Bush (Underground Skunkworks/Black Ops Tech), GAP, Roscoe (LA Precision), Chad Dixon (Long Rifles Inc), APA, Mark at SAC, RW Snyder, Jon Beanland, they can all build great rifles. Personally I like it when they're willing to throw an accuracy guarantee on it with factory ammo because it gives a control in seeing how the thing shoots. But that is strictly personal preference and none of these guys would hesitate to help out if the gun wasn't shooting to your expectations.
So, get your map out and find who is closest to you!