Although not technically a specific "experimental" cartridge, this was used for barrel tests at Armscor during the early 1970's
Cartridges
6 X 51 SAKO XPL
Seems to be some in-house SAKO experimental cartridge. Based on the 6.5x52 Carcano case. I cannot find any additional information on this cartridge, there is no mention of it in Dixon either.
6 X 52R BRETSCHNEIDER
Developed as a deer hunting cartridge by Ingolstadt ballistic expert Bernd Bretschneider. It is the 22 Savage (5.6x52R) necked up to 6mm and looks almost the same as the American 25-35 Winchester, which is a 6.5mm bullet....
6 X 52R BRETSCHNEIDER 2
Improved version of the original 6x52R Bretschneider with the shoulder moved forward
6 X 55 SWISS MATCH
6 X 55R Epa
6 X 58 “G” MAUSER
This was one of the DWM series of 6mm cartridges for Mauser “G” rifles and the 444 series would date from around 1896. From the DWM case book it would seem that this was originally intended as a military cartridge requested from Mauser in 1918. (Dixon Ref. W32) ...
6 X 58 FOERSTER
6 X 58R FOERSTER
6 X 62 FRERES
The 6x62 was designed by Gunter Frères around 1984. Blaser made rifles for the 6x62 although there is no reference on their website at the moment that it is still offered. (Dixon Ref W65)
6 X 62R FRERES
The rimmed version of the 6x62 was launched around 1989, a few years after the introduction of the rimless cartridge and was made for double rifles and drillings. (Dixon Ref W66)
6 X 66 SUPER EXPRESS XPL
During the 1950’s, Gehmann in Germany experimented with the 7x66 SE case, necked down to 6mm. The top version has the stepped shoulder, (see Dixon Vol 1 p.176). The lower version does not have the stepped shoulder. The label reads “6mm Vom Hofe...
6 X 70R
6.17 FLASH
This is one of the LAZZERONI range of cartridges. It is one of two that does not have its own headstamp, but the 6.17 Flash uses the SCRAMJET case
6.17 SPITFIRE
6.25 X 37R TESCHING
6.25 X 43 BRITISH
A British experimental cartridge designed during the early 1970s, using the .280/30 as a parent case, which was necked down to fit a smaller bullet
6.3 X 53R R/K FINNISH
This is one of the cartridges developed in Finland after WW2 based on the Russian 7.62x54R Moisen Nagant case and was offered in a range of calibers up to 9.3mm. It was listed by Sako but production ceased in the mid 1970’s. Originally used VPT military cases but was...
6.35 X 48 GP80 SWISS EXPERIMENTAL
Pressure Test with Copper washed brass case. info to follow
6.35 X 48 US EXPERIMENTAL
Also known as the .25 Winchester. This round was developed in the continued search for a replacement for the 7.62 NATO round. It was designed by Frankford Arsenal but Winchester also manufactured it. The single bullet versions were designated FA-T110. These had a mv...
6.35 X 53 US EXPERIMENTAL (25 HOMOLOGOUS)
This cartridge was developed in the continuing search for a replacement for the 7.62 NATO. Also known as the 25 Winchester and was designed by Frankford Arsenal although also made by Winchester. Simplex loading – designated FA-T125 Duplex loading –...
6.45 X 48 SWISS GP80
Developed as an assault rifle in the late 1970’s to early 1980’s. This was developed as a replacement for the 5.6 Eiger that was not adopted This round is called the 6.35x48 and was the prototype of the 6.45x80, although dimensionally very similar...
6.5 – 257 ROBERTS
6.5 – 300 RYAN
Very similar to the 6.5 – 300 Weatherby but with a higher shoulder/shorter neck.
6.5 – 300 WEATHERBY MAGNUM
This is the 300 Weatherby necked to 6.5mm with no other changes, which makes it the same as the 6.5/300 Weatherby-Wright Magnum that was first listed in the 1962 edition of P.O. Ackley’s Handbook for Shooters and Reloaders. It was developed by Lt. Col Paul Wright of...
6.5 – 378 WEATHERBY
Developed as a 1,000 yard match rifle, if they can get the barrels to last more than a few hundred shots!
6.5 CREEDMOOR
From OUTDOOR LIFE, this is the story about the development of the 6.5 Creedmoor.
6.5 GIBBS
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...
6.5 JDJ
6.5 LEOPARD
6.5 PRECISION RIFLE CARTRIDGE
This is a new development by Hornady and is considered the big brother of the 6.5 Creedmoor cartridge. It is a flat shooting cartridge that gives extended range because of the increased case capacity. It is based on the Ruger Compact Magnum case and gives about 28%...
6.5 REMINGTON MAGNUM
6.5 TCU
6.5 WHISPER
6.5 X 20R ROMANIAN (CHAMBER INSERT)
This was used as a chamber insert for the 6.5x53R Mannlicher and is only known with this headstamp. Made by Hirtenberg in Austria
6.5 X 27 ‘P’ TESCHING
This cartridge is the rimless version of the 6.5x27R (T41). This was apparently only produced in a small quantity by RWS/Utendoerffer. It was shown in RWS catalogs from their c1900 to 1912 catalogs but production had ceased by the 1921 catalog. It was shown in an RWS...
6.5 X 27R ‘P’ TESCHING (RONEZEWSKY)
Most probably introduced by Utendoerffer around 1892. Loaded by various manufacturers up to about WW2. Also called the Ronezewsky Target Pistol.
6.5 X 37R AUSTRIAN TESCHING
T68 from Dixon (Vol.2 p.331). Experimental small bore target cartridge from around 1900-1910. Different from the 6.25x37R, as this is a straight case.
6.5 X 40 Z
Based on the 5.56 NATO round loaded to the same OAL, it is an attempt to give an improved cartridge on the AR15 platform.
6.5 X 40R G TESCHING
6.5 X 41R BARTSCH
6.5 X 41R TESCHING (ROTH #775)
This is the Roth case #775, T61 from Dixon. It resembles the 6.5x41R Bartsch.
6.5 X 42 PCC
This is another attempt to fit the next best design on the AR platform. Based on the 5,56 case with a 6,5mm bullet
6.5 X 43 IWK
After the end of the 2nd World War, the German arms industry was all but destroyed and severe restrictions placed on the Germans in terms of weapons production. The old firm of DWM (Deutsche Waffen und Munitionsfabrik), Karlsruhe was reorganised into IWK (Industrie...
6.5 X 47 LAPUA
6.5 X 48R SAUER
Part of a series of cartridges based on the English .360 Express case and dating from the late 1890’s to early 1900’s. was listed by Geco (RWS) as well as DWM up to the mid 1930’s, (Dixon Ref. GSP17)
6.5 X 50 JAPANESE ARISAKA (TYPE 30)
M1899 Type 30 Arisaka Rifle Introduced by Japan in 1897 in the move to smokeless powder. It was based on the Mauser and Mannlicher idea and was designated the Type 30. Used by the Japanese until 1905 when it was replaced by the Type 38. Japanese made Type 30...
6.5 X 50 JAPANESE ARISAKA (TYPE 38)
Type 38 M1906 Arisaka Rifle During 1905 the Arisaka rifle was redesigned to the Type 38 that stayed in service until after WW2. The round nosed bullet was replaced by a pointed bullet that weighed 139gr. ...
6.5 X 50 RWS