6.8mm REMINGTON SPC

The following from the Wilson Combat website: "The 6.8 Special Purpose Cartridge (6.8x43mm) was initially developed by MSG Steve Holland and Chris Murray, a United States Army Marksmanship Unit gunsmith to offer superior downrange lethality over the 5.56 NATO/.223...

6.53 SPITFIRE

Apparently only about 2000 of these cases were manufactured during the late 90’s, but it could not be used because of the fact that “SPITFIRE” was already registered as a trademark. Uncertain how many got into circulation but not a lot.

6.5mm – 06

The 6.5mm-06 A-Square originated as a wildcat, based on the popular .30-06 Springfield.  A-Square standardized the dimensions of the cartridge and submitted them to SAAMI in 1997. Currently produced by Nosler, Quality Cartridge and A-Square. No. 1 produced by OPM...

6.5 GRENDEL

The 6,5 Grendel dates from around 2002 and was officially launched in 2003, five years before the 6,5 Creedmoor. It is a compact cartridge that was designed to compete with the 5,56 NATO in battle conditions and more specifically to operate from a standard AR15...

6 X 47 LAPUA

Match cartridge designed by Robert Whitley in 2007. Not to be confused with the 6x47 Federal, which is the 222 Magnum case opened up to 6mm, the 6 x 47 Lapua is based on the 6.5x47 Lapua case necked down to 6mm.             ...

6 X 47 FEDERAL

   At one stage this development formed part of the US SAW (Squad Automatic Weapon) program, but tests with the 222 Magnum case opened to 6mm with commercial bullets, different propellants and various over-all lengths did not show sufficient progress to...

6mm – 250

Can almost be classified as one of the "first" attempts by American wildcatters with the 6mm. This is the standard 250 Savage case necked down to 6mm with no other changes. Various versions of 6mm experiments exist based on the 250 Savage case, as well as the 243...