308 MYRA
The 308 Myra is an Australian design and was originally developed in the late 1950's by Australian gunsmith Arthur Langsford from Melbourne, who named the company after his wife Myra. It is based on the 222 Remington case necked up to 30 cal.
260 AAR
The 260 AAR, or All Around Rifle was originally designed by P.O. Ackley and is essentially a 257 Roberts Ackley Improved that was necked to 6.5mm.
375 WATERS EXPRESS
Developed by Ken Waters around 1968 and was based on the 44 Marlin case necked down.
228 WEATHERBY MAGNUM
The 228 Weatherby was never commercially manufactured and information about this cartridge is scarce. On the Weatherby.dk forum it is stated that the 228 was Roy Weatherby’s second development after the 220 Rocket and it was based on a shortened and necked 275 H&H...
41 SHORT COLT, SINGLE ACTION
The 41 Shot Colt, Single Action was launched in 1875 together with the series of Colt New Line single action revolvers. The rim diameter of this round was larger than the double action versions and the chamber distance in the single action revolvers were greater so...
450 MARS (LONG CASE)
Largest of the experimental cartridges made by H.W. Gabbet-Fairfax for a Mars semi-auto pistol, in all probability between 1895 – 1903. These cartridges were to be submitted for military trials but were ultimately not successful. The main reason of its...
375 VIERSCO MAGNUM
The 375 Viersco Magnum was developed by Dave Viers from Black Diamond Rifles as well as for the super long range "Hard Target Interdiction" rifles by Desert Tech from West Valley City, Utah. Specimen below loaded with the 414gr. GS Custom solid.
6.5mm – 06 ACKLEY IMPROVED
10.6mm GERMAN ORDNANCE REVOLVER
Before the unification in 1871 Germany consisted of a collection of independent states and kingdoms, each having its own weaponry. With the newly formed Germany they sought to standardise their weaponry, including rifles, artillery and cavalry. It seems that side-arms...
26 NOSLER
Relatively new cartridge officially launched at the 2014 SHOT show. Full detail HERE
375 TAYLOR
For all practical purposes the same as the 375/338 Win Mag, being a 338 Win Mag case necked up to .375 or a 458 Win Mag case necked down to .375. See also 375/338 Win Mag
228-250 DONALDSON
41 SHORT COLT D/A SHORT CASE
The 41 Short Colt, Double Action Short case was first listed in 1884. It has the same case length as the older 41 Short Colt, Single Action but with a smaller rim diameter to fit the double action cylinder. (Erlmeier, Brandt Ref. 391)
41 SHORT COLT D/A LONG CASE
The 41 Short Colt Double Action (Long Case) originated in the mid 1880’s together with the Short Case and listed to the end of the 1940’s. From records it would seem that only Peters and the United States Cartridge Company manufactured this version. (Erlmeier, Brandt...
338 NORMA MAGNUM
The .338 Norma Magnum was originally developed as a long-range sport shooting wildcat cartridge by the American sport shooter Jimmie Sloan with the help of Dave Kiff, owner of Pacific Tool and Gauge, who made the reamers and headspace gauges. It was designed as a way...
450 MAGNUM EXPRESS
The 450 Magnum Express was developed by North American Arms in 1981 although it was not made available until 1984. It is actually nothing more than the 45 Winchester Magnum that was lengthened to 1,344 inches and the cases were made for them by Winchester. The...
375 STRIEBY
Developed by Ronald Strieby and based on the popular 348 Winchester case necked up.
490 BSA POLICE
info to follow- Single ball
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...
26 ALTON JONES
375 SNIPE-TAC
The 375 Snipe Tac is an improved 408 Chey-Tac case necked down to .375cal and shoulder blown out to 35° and pushed forward about .050 inch 375 Snipe Tac by Black Diamond Rifles
228 R&M HAWK
41 LONG COLT, OUTSIDE LUBRICATED
The first model Colt Double Action revolvers were launched in January of 1877 in .38cal. and the .41 followed short after. It was originally launched for the Colt New Line revolvers with an outside lubricated bullet and with the introduction of the Long Colt D/A...
41 LONG COLT, INSIDE LUBRICATED
The 41 Long Colt with inside lubricated bullet was launched around 1896 and replaced the old heeled-type bullet. The case was lengthened to accommodate the lubricated part of the bullet. The case is therefore longer that the old outside lubricated case. It was...
450 LONG C.F.
450 LONG C.F. (50/64" CASE) This was one of the 450 Long C.F calibers listed in the late 19th to early 20th Century. These cartridges were listed in a variety of case lengths and called 450 Long, mainly in order to differentiate them from the 450 Short CF Revolver....
375 RUGER
Developed in a joint venture between Ruger and Hornady, the .375 Ruger was first introduced 2007. The idea was to create a cartridge similar in length to the .30-06 Springfield, but with a case capacity comparable to the .375 Holland & Holland. A major selling...
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%...
10.4mm SWISS ORDNANCE REVOLVER M.1878
The 10.4mm Swiss Ordnance M1878 revolver is the center-fire successor to the original M1872 rimfire revolver that was converted from rimfire to center fire as the M1872/78. Earlier cases were also issued with copper cases and outside lubricated bullets. Later versions...
257 WEATHERBY MAGNUM
375 REMINGTON ULTRA MAG
Remington introduced the .375 Remington Ultra Mag in the fall of 2000 by simply necking up its popular .300 Ultra Mag case — a case that is based on the beltless .404 Jeffery with a slightly rebated rim.
228 ACKLEY MAGNUM
The original version of the 228 Ackley Magnum was developed by P.O. Ackley in 1938, although the idea came from around 1936 and was one of his first wildcat designs. He was looking for a better version high velocity .22 cal. rifle and his design is based...
41 LONG C.F.
According to Pistol & Revolver Cartridges by White & Munhall the 41 Long Colt (original) was launched only by Winchester around 1875 and was used in the Colt New Line revolvers. It was listed by Winchester until 1921. (Erlmeier, Brandt Ref. 387) ...
375 MERCENARY
This is another design by Alaskan ELR shooter Pro Martusheff (aka Swamplord) from Precisioned Rifle Ordnance and dates from 2013 but was officially launched in August 2014. The original cases were made by Bertrams Australia, but current production is by RCC Brass in...
450 JURRAS
- info to follow -
375 LETHAL MAGNUM
The 375 Lethal Magnum was developed by Lethal Precision Arms to achieve extremely high ballistic performance in a portable package for long range shooting. By using an custom built LPA rifle, LPA owner Mitch Fitzpatrick took 1st place during the 2016 King of 2 Miles...
10.4mm ITALIAN ORDNANCE REVOLVER
The 10.4mm Italian Ordnance was adopted in 1874 for the Army Model 1872 revolver that was based on the Chamelot-Delvigne system. It remained in service with the Italian Army until after WW2, having never officially being retired although largely replaced by the 9mm...
7.5 X 54 FRENCH Mle. 29
At the end of WW1 the French faced the decision to replace the ageing 8mm Lebel and Berthier rifles with a more modern cartridge. Various experimental rounds were tested during that time period but in 1924 the 7.5 x 58 M24 was developed. However, not long afterwards...
7.5 X 54.5 SWISS GP08
This is a 7.5 x 54.5 Schmidt-Rubin GP 08 experimental, as confirmed by the headstamp, according to Cartridge Head Stamps of Switzerland 1867-1985, by Michael am Rhyn. The case manufacturer is T = Selve Thun, Switzerland and the material was supplied by D. = Düren,...
7.5 X 53.5 SWISS CADET
The Kadettengewehr (Cadet Rifle) was adopted on the 27th of July 1898. Trials were done with the Mannlicher carbines and the Schmidt-Rubin type rifles. These single shot rifles had the powder charge of the loads reduced by around 10% in order to fit the smaller statue...
7.5 X 53.5 SCHMIDT-RUBIN M.90/23
The Swiss Cadet Corps were still using rifles chambered for the old M.90 and M.90/03 round, but as ammunition stocks became limited, a run was produced by Patronenfabrik Solothurn as can be seen by the 'S' on the headstamp as a redesigned version compatible with the...
7.5 X 53.5 SCHMIDT-RUBIN M.90/03
It was found that the primer composition of the M.90 was too corrosive, so the M.90/03 was introduced with a reduced mercury fulminate composition from 48.8% to 40% of the primer load. The copper (tombak) primer cup was also changed to brass with a black primer...
257 SHOOTING TIMES WESTERNER
375 KNOCKOUT
The 375 KO is, as its name suggest, a true knockout blow. It's ballistics are superior to any other suppressed round for the AR-15/MSR platform. It leaves the muzzle with 1050 fps and 857 fpe. While the 857 fpe is remarkable enough for a subsonic as it is...
7.5 X 53.5 SCHMIDT-RUBIN M.90
Rudolf Schmidt, Director of the Waffenfabrik Bern together with Eduard Rubin, Director of the Munitionsfabrik Thun, designed the 7,5 mm Gewehrpatrone Modell 1890. Before that, Rubin had already designed various experimental cartridges for the Swiss military, but it...
7.5 X 53.5 RUBIN VGP M1888
VGP = VERSUCH GEWEHR PATRONEN. This was one of the experimental cartridges by Eduard Rubin in the late 1880’s
7.5 X 53.5 RUBIN VGP M1885 TYPE 2
VGP = VERSUCH GEWEHR PATRONEN. This was one of the experimental cartridges by Eduard Rubin in the mid 1880’s
7.5 X 53.5R RUBIN VGP M1885 TYPE 1
VGP = VERSUCH GEWEHR PATRONEN. This was one of the experimental cartridges by Eduard Rubin in the mid 1880’s
7.5 X 45R RUBIN M1883
VGP = VERSUCH GEWEHR PATRONEN. This was one of the experimental cartridges by Eduard Rubin in the early 1880’s
225 WINCHESTER
30-40 BENNETT XPL
This was an experimental cartridge from 1893 on the 30-40 Krag case with the belt added for alignment and positioning in clips. It is unsure if a gun was ever manufactured for this. It was granted patent #503,117 on 15 August 1893. This is also discussed on p. 162 of...