Contents of an interesting lecture I attended several months back.

[Tony Williams]

.280 British



If not for the shoulder angle, one might mistake it for 6.5 Grendel...

As a cartridge, I prefer the .270 - the shape is more balanced, and calibre is a better compromise IMO. However, as tested the bullet was too light for long-range performance at only 100 grains. Increase that to around 120 grains (scale down that excellent .276 Pedersen bullet a tad) and I believe it would still be better than anything available today as a military rifle/LMG cartridge (service or experimental).