06-14-2013, 10:22 AM
I'm getting a nice balance in performance from my 6.5 Grendel right now, and have been for the past 4 years. I have never mass-loaded any loads that showed signs of excessive pressure, and have been able to match factory velocities with 123gr pills.
A larger bolt would allow higher pressures, but at what performance gains? 100fps...200fps? It might make a difference for some of the guys running 6mm on the extreme end of performance requirements, but still won't get the Grendel up to speeds of the .260 Rem class guns, although it would be close IF you could squeeze out 200fps.
The .30 RAR is a whole different class of case, because it makes the AR15 a single-stack magazine, which would be fine for hunters.
A larger bolt would allow higher pressures, but at what performance gains? 100fps...200fps? It might make a difference for some of the guys running 6mm on the extreme end of performance requirements, but still won't get the Grendel up to speeds of the .260 Rem class guns, although it would be close IF you could squeeze out 200fps.
The .30 RAR is a whole different class of case, because it makes the AR15 a single-stack magazine, which would be fine for hunters.