Thanks for the link.
Parent case for the .338 Lapua is the .416 Rigby. The CheyTac uses .505 Gibbs Magnum as the parent. Fortunately Jamison stepped up and did a run of .505 Gibbs cases, addressing the higher pressure by including a belt on the inside.
Jamison was hounded and eventually shuttered by atf and associated .govs for exporting military material without proper dispensation. Seem they sent a box of, as I recall, .577-450 Martini-Henry brass overseas.
Wonder who makes the optics for these Milers?