10-27-2014, 05:52 PM
I looked at this years ago, and here is where I am at with it conceptually:
* Building a specific receiver set for the Grendel is probably a custom job only for all the reasons stated here already.
* There are no practical performance advantages to be had, especially considering powder development.
* If polymer magazine option is the main driving point, then why are the Six8 guys already talking about making new mags specifically for the Six8 receiver set other than PMAGs, with less capacity, but longer COL? Because they want BC that we already have. They want performance, and don't really care about 30rd PMAGs as much as the Saudi's do.
* If you want performance enhancement, you need to step up to a new case with more powder capacity, and a COL of ~2.5". Set your on-target performance requirements, then determine what bullets and speeds will achieve that. Set the desired pressures you want to run, then build engineer the dimensions around that with the desired FOS. Eventually, a pressure containment system and receiver set will begin to form.
* Set aside a pile of cash equal to a decent residential home cost for RDT&E.
* See if you can get one of the brass manufacturers to add yet another cartridge to their production schedule.
Another way around this, which is the conclusion we came to years ago, is to make a Lancer-style magazine with metal body and feed lips in the mag well, and a polymer mag body outside of the gun. There is your 30rd or higher capacity magazine that will stack correctly.
And I think this is a legitimate discussion because more and more people are going to want little 6.5 Grendel blasters with the availability of cheap plinking ammo now with the steel case. All of this is doable with a hybrid Lancer-style magazine, to include pushing the OAL out more if you really want for hand loaders, but QC will have to be more stringent on increased COL requirements, leading to expectations of cost increases if they are to hold the tooling and inspections to a much tighter standard than existing mags.
![[Image: 320e21c45bbde24024ea7aadd7434fca.jpg]](https://www.rainierarms.com/img/shop/product/320e21c45bbde24024ea7aadd7434fca.jpg)
* Building a specific receiver set for the Grendel is probably a custom job only for all the reasons stated here already.
* There are no practical performance advantages to be had, especially considering powder development.
* If polymer magazine option is the main driving point, then why are the Six8 guys already talking about making new mags specifically for the Six8 receiver set other than PMAGs, with less capacity, but longer COL? Because they want BC that we already have. They want performance, and don't really care about 30rd PMAGs as much as the Saudi's do.
* If you want performance enhancement, you need to step up to a new case with more powder capacity, and a COL of ~2.5". Set your on-target performance requirements, then determine what bullets and speeds will achieve that. Set the desired pressures you want to run, then build engineer the dimensions around that with the desired FOS. Eventually, a pressure containment system and receiver set will begin to form.
* Set aside a pile of cash equal to a decent residential home cost for RDT&E.
* See if you can get one of the brass manufacturers to add yet another cartridge to their production schedule.
Another way around this, which is the conclusion we came to years ago, is to make a Lancer-style magazine with metal body and feed lips in the mag well, and a polymer mag body outside of the gun. There is your 30rd or higher capacity magazine that will stack correctly.
And I think this is a legitimate discussion because more and more people are going to want little 6.5 Grendel blasters with the availability of cheap plinking ammo now with the steel case. All of this is doable with a hybrid Lancer-style magazine, to include pushing the OAL out more if you really want for hand loaders, but QC will have to be more stringent on increased COL requirements, leading to expectations of cost increases if they are to hold the tooling and inspections to a much tighter standard than existing mags.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com