Initially, it's being offered in .338 Lapua, .378 Wby., .416 Rigby, .460 Wby., and, for the stout of shoulder, .505 Gibbs. All are capable killers, but I have a hard time resisting the allure of the .416, so that's the rifle I got. (Note that the .338 isn't legal for use on dangerous game in Africa, where a minimum caliber of .375 H&H/9.3x74 is required.) To handle these heavy-hitters, the DGR has two steel crossbolts reinforcing the walnut stock. And the strength of the Mauser action, with its controlled-round feed, is the stuff of legend. The dovetails machined right into the receiver are a nice touch and eliminate the need for scope mounts, which are a potential weak point, should you choose to go with an optic over the open sights.