No one is going to run 110s in the ARC either, that bullet is shoved way down in the ARC case too. On top of that all of the Grendel cases are very thin and bulge like a belted magnum when you push pressures. See the photo below from the Grendel forum. To make things worse they decided on a bolt with a .136" recess, that pulls the case .012 further out of the chamber leaving more unsupported by the chamber walls. Look at the sectioned cases and how far down the thin walls of the Grendel case goes compared to the thicker 6.8 case. That should be clear why we can push the 6.8 harder than they can the Grendel cases. I tried to get Starline to make the lower area in the cases thicker only up to the point that the case was supported by the chamber walls but they would not do it...they are in the business of selling brass. Norma brass will outlast all other brands Grendel brass.
The military does not believe in making the freebore .020 in front of the pt of the bullet, all of their freebores are long and have a long jump. The 6mm ARC is a special deal, they even sidestepped the high temperature tests. That is why they had to drop the charges on the 6.8, pressures went through the roof after sitting in a connex in 120* temps all day.
Personally I don't care what the military plays with. Us wildcatters make whatever we want, to do what we want them to.
BTW see the bullet in the Grendel case? That is a 123, now think how long the 110gr is and shorten that Grendel case by .030" The base will be half way to the primer LOL. The 6 ARC will be fine for PRS, hunters and paper punchers but IMO it is the wrong choice for military. mags don't feed that well and AR15 bolts will not hold up especially if they take it to the heat of the sandbox.
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