This is the 298 Westley Richards Miniature Express, that Westley Richards listed in their 1909 catalogue for sigle shot bolt action rifles.   

Normal 280 ROSS case but with the rim turned down to fit the standard M88 Mauser bolt face.   

Developed by WJ Jefferey & Co around 1915 and is based on the 333 Jefferey case necked down. Proof

Semi-rimmed cartridge introduced in 1906 by Sir Charles Ross for his bolt action sporting rifles. It was a very popular cartridge and was the basis that Hermann Gehrlich used for the development of the 280 HALGER. Huntingdon Die Services, USA Ross Rifle Co. Canada...

This is the rimmed counterpart of the 280 Ross, by Charles Lancaster.      Snapcap

Manufactured for Sir Charles Ross in 1906 by Eley. It was replaced by the larger 280 ROSS, which is a semi-rimmed cartridge. The 28 Ross is also known as the 280 Roosevelt because specimens of this cartridge were found in the estate of Theodore Roosevelt.   

Short lived cartridge by Holland & Holland for double rifles. Never gained popularity.

The 7x63 was reportedly made for an experimental rifle designed by George Norman and made by the Birmingham Small Arms Company around 1910. It is speculation only, but it might have been the idea to submit this to the Chief Superintendent of Ordinance Factories in...

For a semi-auto rifle by Birmingham Small Arms Company in 1911.      

This is another experimental match type cartridge by Rigby by necking down the 350 Nitro case.   

Proprietary loadings of the 7x57 Mauser     This is the box for the KYNOCH  7 M.M cartridge OPM South Africa Cases by Horneber in Germany for Pieter Becker, the South African agent for Horneber                ...

Developed by Rigby ca 1927 by necking down the 375 2¼" Flanged. This cartridge is similiar to the 7mm Holland Flanged Magnum, but with thicker rim.      

Made by shortening and necking down the 375 H&H Modern loading by Wolfgang Romey PROOF Load  

This is the rimmed version of the 275 Holland & Holland developed round about 1911-12. Made for double rifles.               ...

Based on the 280 ROSS case that was shortened to 2.5" to form a match cartridge during the 1920's   

Smallest of 3 in a series developed by the Birmingham Small Arms Company. It was used in bolt-action rifles on the P-14 action.

This is a proprietary loading of the 6.5x54 Mannlicher   

This is the 6.5x53R Mannlicher but in a proprietary loading     

This is the British designation for the 6.5x53.5R Mannlicher.    British loading with LT-Cap bullet

Introduced in 1913 by George Gibbs for bolt action sporting rifles.                              

      This is the British version of the 6.5x53R Dutch/Romanian Mannlicher. Usually comes with a Fraser oblique ratchet bullet

Target as well as rook/rabbit cartridge mainly used in Martini type or other single shot rifles      

Relatively uncommon, this is the .300 or .295 Rook rifle shortened and necked down to .250''   

This is the 297/230 Morris Long cartridge necked up to .250''

Developed in 1921 by James Purdey for a lightweight double rifle. Relatively rare as it was not a commercial success.   

Introduced in 1955, this was the last belted magnum case by Holland & Holland Modern load by Wolfgang Romey, Germany Laboratory for Ballistics, Germany This case was done by OPM in South Africa. It is an untrimmed 458 Win basic brass case and overstamped...

Developed around 1923 reportedly for Manton & Co., Calcutta, India by Kynoch.                    

This is an early experimental British loading made by necking down the 375/303 case to .240.     

This cartridge is also known as the .270/245 Holland & Holland Rimless Magnum. There are not many references to it, one being Robert T. Buttweiler's auction catalog XII-3-352. It was developed by David Lloyd in 1952 (Box date - 15 OA, which translates to...

The 240 Flanged is the rimmed counterpart of the 240 Rimless and dates from the early 1920's new by OPM for local client                    

   Vey early loading   Proof Load with purple base stripe. Bullet is a wire tip. Different versions with HOLLAND headstamp. Note the first specimen with the prominent primer ring crimp.          ...

   Probably formed by necking down the .320 Long case, but little other information available on this cartridge. There is a link to a 320/230 Target Pistol on Gunboards.com. The gun was estimated to have been manufactured between 1870-80 and might have been...

This is a longer necked version of the 297/230 Morris Short

The 297/230 Morris Short dates from the mid 1880's and was developed as a sub caliber training cartridge in auxiliary barrels used in the 577/450 Martini Henry. It was also later adapted for use in the 303 Lee-Enfield/Metford rifles as well as in revolvers. It...

   The Lancaster was an early development for sub-caliber practice. It has a copper case with battery cup Boxer style primer. Was loaded with 3,0gr. black powder with a 30gr. round nosed lead bullet. It was in all probability replaced by the 297/230 Morris...

   This is the 220 Rook Rifle, or 22-4-30 ELEY Long. Listed in the 1899 Eley catalogue as a rook/rabbit rifle. According to Fleming, the earliest mention of this cartridge was in an 1884 Fraser advertisement. Believed to be an early centre fire version of...