The 240 Spectre is another cartridge deigned to operate from the AR-15 platform and is the companion cartridge to the 338 Spectre and also uses the 6.8 Rem SPC case. It is also very similar to the 6mm ARC.
50 KRATER
Developed for the AR-10 platform, as far as could be ascertained, it was developed around 2014. The 50 Krater is based on a shortened 300 RUM case. There was a mention of the 50 Krater on The Texas Hunting Forum and that a company called Outdoor Shooter Supplies...
45- 80-480 SHARPS STRAIGHT 2.4″
Interesting box found in South Africa, not mine but from a local collector. - Kynoch loading for the 45-80-480 Sharps. Hoyem 4:28 lists the Sharps 2.4" case as a 90 and 100gr. loading with 550gr. bullet. In the book about the Birmingham Cartridge Manufacturers by CW...
35 WILD WEST GUNS
The 35 WWG was developed by Jim West of Wild West Guns, in Anchorage Alaska. It was announced at the 2019 Shot Show, but only officially launched in 2021. It started with the 457 WWG in January 1994 with Jim developing his own custom rifle, the Co-Pilot, a custom...
30 WILD WEST GUNS
The 30 WWG was developed by Jim West of Wild West Guns, in Anchorage Alaska. It was announced at the 2019 Shot Show, but only officially launched in 2021. It started with the 457 WWG in January 1994 with Jim developing his own custom rifle, the Co-Pilot, a custom...
19 HSM
The 19 HSM is based on the 30 Carbine case necked to .204”.
395 TATANKA
The 395 Tatanka was developed by Ronald A. Berry M.D with barrels made by McGowan. Ron has developed about 2 dozen different wildcats, but only two have been loaded as proprietary loadings, namely this one and the 500 Mbogo. It is based on the 416 Rigby case with...
395 GSC
GSC = Gerard Schulz Custom, a bullet manufacturer in South Africa.
380 HOWELL
One of a set of 6 cartridges in the Howell range that are based on the 30-06 case and was developed during the mid-90’s by well known firearms writer Ken Howell and rifles and cartridges manufactured by American Hunting Rifles Inc. ...
38-90 WINCHESTER EXPRESS
First offered in the October 1886 Winchester catalogue and was listed as the Winchester Express Single Shot
247 HERTER’S MISSILE MAG
One of the Herter's range with a double shoulder. Supposed to generate more velocity
288 BARNES SUPREME
284 WINCHESTER
Below is a longer case version of the 284 Winchester. I am still looking for info on it
284 HEAVY EXPRESS SHORT ACTION MAGNUM
284 HEAVY EXPRESS MAGNUM
280 REMINGTON (7mm EXPRESS REM)
The 280 Remington was introduced in 1957 and is based on a 30-06 case necked to .284" and the shoulder moved a fraction forward. In 1979 Remington renamed the cartridge to the 7mm Express Remington, which was exactly the same cartridge with updated factory loads. It...
280 RCBS
The 280 RCBS is basically the Fred Huntington version of the 280 Ackley Improved, but with a 30° shoulder, whereas the 280 Ackley has a 40° shoulder.
280 HAWK
280 DUBIEL
The 280 Dubiel was developed by John Dubiel and was formed by necking down the 300 Holland & Holland.
280 ACKLEY IMPROVED
28-30-120 STEVENS
The 28-30-120 was designed by Charles H. Herrick for the Stevens Company around 1900 in answer to a demand for a cartridge a little more powerful than the .25-caliber cartridges, but not quite as large as the .32-40, so that it could be used satisfactorily for deer,...
245 SABRETOOTH
From around 2009 and based on the Winchester Short Mag case
28 WINCHESTER CENTER FIRE
The originals of this are extremely rare. Dating from around 1912, it was produced by Winchester but it is uncertain if it was officially tested. It is a 30-06 necked down to .28. also known without a headstamp. The 2nd specimen is a replica made...
28 NOSLER
The 28 Nosler was developed as a companion to the 26 Nosler that was launched earlier and is intended to be one the most powerful 7mm loads offered commercially. It shared the same case and overall length than the 26 Nosler.
277 WOLVERINE
The 277 was developed by Mad Dog Shooting Systems and is based on the 5.56 NATO case necked up to 6.8mm. Any existing AR platform can be used with just a barrel change. The 277 Wolverine is basically a hybrid cartridge between the 5.56 NATO, 6.8mm SPC, 300 Blackout...
277 SMITH
277 SIG FURY
For a time now the US Army has been searching for a Next Generation Squad Weapon System and during 2018 it supplied the specifications of what type of system they were looking for and invited the firearms industry to come up with the designs for a Squad Infantry Rifle...
277 ICL FLYING SAUCER
The ICL cartridges used the same minimum body taper like the Ackley Improved versions but instead of a 28 or 40 degree shoulder (Ackley) the ICL used a 45 degree shoulder.
276 BARNES-JOHNSON EXPRESS
275 HOFFMAN MAGNUM
The 275 Hoffman is a normal 275 Holland & Holland with a proprietary headstamp.
38-72 WINCHESTER
Introduced in the June 1896 Winchester catalogue for the model 1895 rifle. Original loads were black powder, but smokeless loads were also offered later. The model 1895 was no longer offered after 1910, but cartridges were still loaded afterwards.
270-338 WINCHESTER MAGNUM
270 WINCHESTER SHORT MAGNUM
The launch of the 270 WSM in 2002 marked the first time a .277” cartridge was introduced in the US since the 270 Weatherby in 1945. It followed a year after the introduction of the 300 WSM.
270 WINCHESTER
Karlyn Flare Colonial Ammunition Co for the New Zealand Forestry Service The two S&B variations are proof loads SOUTH AFRICAN HEADSTAMPS AND VARIATIONS Red anodized aluminium dummy by THOR Engineering PMP basic brass Vanity headstamp by OPM...
270 WEATHERBY MAGNUM
244 REMINGTON (6mm REMINGTON)
See notes on the 6mm Remington
270 SHOOTING TIMES WESTERNER
270 REDDING
Basically a newer/different version of the 270-08 wildcat from the 1950's but with slight improvement. How slight is probably up for debate. The South African 270 SABI is almost identical to this.
38-70 WINCHESTER C. F.
The 38-70 Winchester was chambered in the Model 1886 Winchester lever-action rifle although first listed in April 1894. It was not a popular cartridge and did not last very long. There were a number of more powerful cartridges introduced for the Model 1886 at roughly...
270 NEWTON
The 270 Newton caliber is most probably not one of Charles Newtons inventions. It would seem that it came along much later than the original 30, 35, 40 and famous 256 (6.5-06) Newton calibers. This case is by Speer, but apparently Western also made it....
270 MASHBURN SUPER
One of the Art Mashburn wildcats
270 IHMSA
Designed by Elgin Gates and based on the 300 Savage case. It is one of the more popular of the IHMSA (International Handgun Metallic Silhouette Association) cartridges.
38-56 WINCHESTER. C. F.
Another development by Winchester for the Model 1886 rifle. The 38-56 was introduced in 1897 but was never popular and disappeared from the scene around 1910. Loaded by Bertram. The specimen 2nd from the right is the "COORS" headstamp and the last specimen is the one...
270 ICL JAGUAR
270 HOWELL
270 HAWK
244 MASHBURN
The 244 Mashburn is an improved version of the 6mm Remington with a shoulder angle of 30° and minimum body taper
270 GIPSON MAGNUM
38-55 WINCHESTER
The 38-55 Winchester started out as the 38-55 Ballard. It was first offered in the Model 1881 Marlin lever action rifle but later offered by a number of US companies, most notably for the Winchester Model 1894. Sears Sportload Legendary Frontiersman Oliver F....
38-55 BALLARD
This was the paper patched version for Ballard rifles, that became the 38-55 Winchester for Winchester and other lever action rifles.