Yep, it can be done. The "primer end" of a 30-06 (.308, 7mm-08, and a host of others) is the same as the 45 ACP. It's a pain, and certainly not cost effective, but it can be done.
This is the sort of thing you'd resort to if there were, oh, say, an AMMUNITION BAN :barf: or something like that going on.
This rates way up there, just short of swaging empty 22 brass around a lead core to make jacketed .224 bullets. That sort of thing was done by enterprising shooters during the Depression and WWII, when components were both expensive and scarce.
It could never happen here.
Could it?
