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...

GSC = Gerard Schulz Custom, a bullet manufacturer in South Africa.                   

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.    ...

First offered in the October 1886 Winchester catalogue and was listed as the Winchester Express Single Shot        

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.    

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...

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...

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....

This was the paper patched version for Ballard rifles, that became the 38-55 Winchester for Winchester and other lever action rifles.   

Used in Remington-Hepburn match rifles        

This cartridge was listed in the Massachusetts Arms Co. 1885 catalogue with the 255gr. paper patched, or 245gr. grooved bullet. This cartridge is also very difficult to distinguish from the 35-40 Maynard.   

This was a target load that was used in the Ballard No. 4 and Pacific No. 5 rifles. Original loads were paper-patched.                        

This is the later case with small brass primer. The first case type was the Hart’s patent two-piece case with iron anvil and large primer. By Providence Machine & Tool Co.   

James J. Bullard made single shot rifles at Springfield, Mass. from 1880 to around 1890. His rifles were in two sizes with the 32-40 and the 38-45 made for the small frame rifles. The 38-45 was listed in the 1885 Winchester catalogue but disappeared by 1914.

Target cartridge for the Remington No.1 and Hepburn rifles and were loaded with both paper patched and plain lead bullets.

Introduced by Winchester in 1879 as a higher velocity necked down version of the 44 – 40 Winchester for the Model 1973 rifle. It was also offered by various manufacturers in revolvers. USA                                                                              ...

This is a centre fire version of an earlier rimfire round

Case designed by Frank Wesson for his single shot rifles during the late 1880’s. The Wesson cartridges were not interchangeable with other cartridges for single shot rifles by any other manufacturer. Cartridges were manufactured for him by the US Cartridge Co., UMC as...

- info to follow -   

Roy Weatherby created the .375 Weatherby Magnum in 1944 but not long afterward decided that it was still underpowered. He set out to create an ultra-powered .375 cal. and used the 416 Rigby case as parent design, but with a belt added and combined with the double...

Designed by Reeder Custom Guns, in Flagstaff, AZ. This is one of their most popular cartridges with ballistics close to the 375 Holland & Holland and runs just barely under the 375 H&H. It has been used successfully in Africa on elephant and Cape buffalo. It...

Still looking for info on this   

This is the necked down version of the 417 Black Mamba. Cases were made by RCC Brass. Still looking for additional info.    

The 376 Steyr was introduced at the SHOT show in 1999 as a joint development between Hornady and Steyr originally for use in the Steyr Scout rifle. It is based on the 9.3x64 Brenneke case that was shortened to fit a standard length action.      ...

          The specimen above was made in South Africa by OPM. It has a shorter neck than the Quality Cartridge version Also known as the 375/338 Chatfield-Taylor or the 375/338 Belted Newton. It was developed by RF Chatfield-Taylor...

One of a series of cartridges that are based on the 284 Winchester case, this one necked up to .375 cal.   

   From info posted on shootersforum.com on 17/03/2004, this round was developed by Jim Dougherty of San Pablo, CA. He called it the 375-08 Jaguar. No further info available on who made these cases.

One of a series of cartridges by JD Jones based on the 30-06 case     

This is the 300 Winchester Short Mag necked up to 375   

The .375 Winchester was introduced in 1978 in the Winchester Model 94 XTR Big Bore carbine as a modernized version of the old 38-55 Winchester. Against the hopes of Winchester, the 375 was not a success and was discontinued during the mid 90’s.   

According to the SSK website, a “Whisper®” cartridge must be capable of sub-sonic extreme accuracy with very heavy bullets for its caliber. The 375 Whisper is based on the 7mm Bench Rest case together with the 338 and 416 caliber to convert 308 case head size actions...

This is the improved version of the 375 Whelen that was developed in 1951 by L.R. "Bob" Wallack and named in honor of Colonel Townsend Whelen. The shoulder angle on the original Whelen retained the 17º 30’ shoulder angle whereas the improved version has a 40° shoulder...

Designed by Roy Weatherby as an early ‘improved’ version of the 375 H&H, it was obsolete for a long time before being re-introduced by Weatherby in 2001.

   Developed by Ken Waters around 1968 and was based on the 44 Marlin case necked down.

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.   

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   

Developed by Ronald Strieby and based on the popular 348 Winchester case necked up.   

   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  

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...

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.   

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...

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...

   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...

One of a series of cartridges designed by the Late Lee Jurras, one of the greats in handgun hunting. He was very interested in the exploits of the old hunters with their Howdah pistols and in the early 1970’s brought out his own versions chambered in 6 different...

The 375 JRS was developed by John R. Sundra, who necked an 8mm Remington Magnum to 375 caliber. Its performance is almost identical to the 375 Weatherby.      

The 375 Jensen is based on the 30-06 case necked up to .375 cal. and was developed by Stig Anders Jensen, owner of The Jensen Rifle Company Ltd., a Division of Baltimar Ltd. (Denmark) around May 2004.   

The 375 JDJ was designed and developed by J.D. Jones, from SSK Industries as part of a series of handgun and metallic silhouette cartridges around 1978. The purpose of these cartridges was to give added range and power to the Thompson - Center Contender pistol for...

The 375 ICL (Increased Case Load) was developed by Arnold & Vern Juenke, gunsmiths who owned Saturn Gun Works in Reno, Nevada and is based on the 375 Holland & Holland case. It resembles the earlier Ackley Improved version, but with slightly lower and slightly...

One of a few ‘improved’ versions of the old 375 Holland & Holland case.   

Display Dummy Although listed separately, this is a normal 375 HOLLAND & HOLLAND but with the proprietary Hoffman headstamp. Hoffman Arms, in most cases, called the calibers by their (Hoffman's) own name but the only proprietary cartridges they actually had were...