Tactical Life posts that the military is changing to the 6.8 in SAW and M4

[grayfox]

Looks like they might have driving bands on the projectiles, which will reduce barrel friction and heat.

If someone could scale the image with the bands = .277", you should be able to get a good estimate of COL and case width at the base and shoulder to see if it will fit existing 7.62 NATO mags.

With my graphics program I get an overall length of ~2.799". There is a slight angular offset as you can see by the base, but the closest I can figure it's this. Casing width estimates at 0.4665" about midway up the casing.

edit: the casing measures pretty much straight wall.