They will probably call it a 6.8 something. If they asked me to name it I'd call is a 270 Win #2, or a 277 Winchester.
But it's odd how things in the gun industry get named. The .277 inch is the closest thing in the gun world to a true 7MM.
.03937X 7 = .27559"
A true .277 would be 7.06MM
What we call a 7MM is actually 7.21MM
Some cartridges are just names something that sounds cool to the maker I guess. One of those that is an outstanding cartridge and yet is WAY misnamed is the 404 Jeffery. NOTHING on that cartridge measures .404"
Kind of a coastline/shoreline thing.
Back in the day - bore and the rifle, was the important detail, i.e., 7mm Mauser rifle or .30 Springfield rifle.
Today, with cornucopia chamberings for any given rifle, what one feeds it has become important.
