Is it made from 9310 steel like the Maxim Arms bolt? I wonder what kind of pressure these can take. Everyone throws around the 53K figure for max Grendel presure but thats the max presure of a 5.56 bolt made from 158 carpenter steel not a Grendel bolt made from 9310 steel which has never been rated.
5.56 NATO max pressure is 62,000psi with tested and proofed C-158 bolts, which is 12,000psi more than the AR15 was designed around with the .222 Remington. Tool steel bolts are a result of the AR15 being re-chambered for the .222 Rem Special/AKA 5.56x45 (which was then adopted in a lesser form as the .223 Remington).
Pushing the pressures also required special CMV steel for several reasons, one of which is hoop stress.
If you're trying to push the pressures of the Grendel much past 50,000psi, you're going in a very place in terms of hoop stress. The bolt is the least of your worries.
You need another upper receiver, larger diameter barrel extension, larger diameter barrel tennon threads, and larger bolt to deal with 60,000psi pressures.
There is a reason why Remington used larger diameters with all of the above dimensions on the 30 RAR, and it is capped at 55,000psi.
The 6.5 Grendel system has been rated, and the bolt is not the limiting factor.
