The 7x64 was created50 years before the .280 and is virtually identical to that cartridge. The Speer manual notes the loading information is interchangeable. The 7x64 precedes the .270 as well and is as popular in Europe as the .30-06 is here. I have a Sako AV & 995 in 7x64 and would not hesitate to use them for elk (but I like the .416 better). In any event, europeans have been using this cartridge (and I suspect, on average, they are better shooters than us, refer to the shooting tests required to get a license in Europe if skeptical) with excellent results since 1917.

CE