Availability of 338 Lapua brass etc.

[Cerdan]

After spending a year entirely devoted to handguns and their various calibers, I'm looking into my first target rifle. Currently looking at Sako, either chambered in .308 Win, .300 Win Mag or .338 Lapua Mag.

Is .338 Lapua brass hard to come by? Anything else I should know about handloading this round?

Thanks.