This is the root of the issue. Make it legal and people will justify trying on the bull of a lifetime at longer ranges and with any bullet. Apparently the 77gn TMK is working on elk in the Rokslide hunting forum but even if thats the magic bullet...e question I would have is simple what round loaded in .223 Rem has the energy to drop a Bull elk at 300 yards.
The other problem with this is not the ultimate load possible to stuff into a .223 Rem. Its the run of the mill BiMart bargain basement spire point.
it doesn't mean thats what someone will use.