01-21-2014, 02:37 PM
There are easy ways to make a wildcat and rifle that will shoot them and hard ways. Murry when he first approached me was using a 7.62x45 czech that was near impossible to find and he was using 7mm bullets. I didn't have time and wasn't interested but I machined the bolts for his AR10 and new machine gun design.
Maybe a year later Prvi started selling Carcano brass again. The 7mm bullets that have good BCs are heavy, too heavy for a case with a cap of apx 42gr IMO. Using green bullets designed for optimum BC the 6.5 and 6.8 calibers work better for a 42gr cap case again my opinion. The 6.5x45 Carcano case has the same capacity and performance as the 6.5 BRX. The Carcano case will feed from a AR10 pmag...big plus. 22 Carcano cases will fit in a pmag. Magpul is making 25 round mags that may hold 27 carcano cases.
My Nexgen(AR12) uppers from 2009 are almost identical to the new DPMS GII 308 design except my design works with the old style DPMS lowers and uses any AR15 handguard. The smaller diameter barrels and bolts are a perfect fit for the Carcano case.
AS for performance, 123gr Amax 2750fps from a 20" barrel at apx 55000 psi using an optimum powder. 2800 is easy enough to reach but not at the lower pressures.
The powders are the same range that you guys are using in the Grendel...why I have been here researching.
I have a piston rifle design from 2010 that I haven't produced, it has a 2.5-2.6" OAL. Now that there are companies that will machine molds much cheaper and produce smaller runs of parts it may be feasible to build a design that uses non standard mags.
I have talked to a company rebuilding MK48s. They say it would take a new prawl and simple barrel swap to make the MK48 work with a Carcano based cartridge.
Maybe a year later Prvi started selling Carcano brass again. The 7mm bullets that have good BCs are heavy, too heavy for a case with a cap of apx 42gr IMO. Using green bullets designed for optimum BC the 6.5 and 6.8 calibers work better for a 42gr cap case again my opinion. The 6.5x45 Carcano case has the same capacity and performance as the 6.5 BRX. The Carcano case will feed from a AR10 pmag...big plus. 22 Carcano cases will fit in a pmag. Magpul is making 25 round mags that may hold 27 carcano cases.
My Nexgen(AR12) uppers from 2009 are almost identical to the new DPMS GII 308 design except my design works with the old style DPMS lowers and uses any AR15 handguard. The smaller diameter barrels and bolts are a perfect fit for the Carcano case.
AS for performance, 123gr Amax 2750fps from a 20" barrel at apx 55000 psi using an optimum powder. 2800 is easy enough to reach but not at the lower pressures.
The powders are the same range that you guys are using in the Grendel...why I have been here researching.
I have a piston rifle design from 2010 that I haven't produced, it has a 2.5-2.6" OAL. Now that there are companies that will machine molds much cheaper and produce smaller runs of parts it may be feasible to build a design that uses non standard mags.
I have talked to a company rebuilding MK48s. They say it would take a new prawl and simple barrel swap to make the MK48 work with a Carcano based cartridge.