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.