09-09-2013, 07:56 PM
I've been doing research to look further into who is making 5R button-rifled pipes. The only ones I have owned or heard of are always a single-point cut-rifled process. Bore tightness is another variable that has more to do with building pressure and velocity than others.
The MV between 6.5 Grendel and 6.8 SPC is actually a lot closer than has been advertised. When you compare a 16" Grendel to a 16" SPC with factory loads for both, they are the same. We have been told that we need 24" barrels to get any kind of velocity with the Grendel that will compare with the 6.8 SPC, but that line of thought has been proven false. Even if you do start 150fps slower, the BC catches up to the 6.8 quickly. For example, you need an 18" 6.8 to be competitive with a 14.5" Grendel for maximum effective range (twice what 95% of all hunters are capable of anyway).
The MV between 6.5 Grendel and 6.8 SPC is actually a lot closer than has been advertised. When you compare a 16" Grendel to a 16" SPC with factory loads for both, they are the same. We have been told that we need 24" barrels to get any kind of velocity with the Grendel that will compare with the 6.8 SPC, but that line of thought has been proven false. Even if you do start 150fps slower, the BC catches up to the 6.8 quickly. For example, you need an 18" 6.8 to be competitive with a 14.5" Grendel for maximum effective range (twice what 95% of all hunters are capable of anyway).