ICL = Increased Case Load. This is an improved version of the 257 Roberts

   The history of the HAWK range of cartridges can be found HERE

   This is the 25 SOUPER (25-08) Improved, with a 40° shoulder.

   This is the original story about the 257 Condor taken from GUNS MAGAZINE, Jan 1960 When a competent engineer decides to design a wildcat cartridge, some old ideas are given some new twists. The usual wildcatter reshapes an existing case, uses existing...

 - info to follow -    

   Basically a 300 Win Mag necked to .257"

The .256 Magnum is a varmint and predator cartridge introduced by Winchester in 1960. In 1961 Ruger brought out the Hawkeye single shot pistol for the .256 Magnum. The next year (1962) Marlin chambered their Model 62 Levermatic rifle for the new Winchester cartridge....

  The .256 Newton is a high-velocity rimless cartridge and was developed by Charles Newton in 1913 in conjunction with the Western Cartridge Company. It is a 30-06 Springfield cartridge shortened and necked down to .264" with a different shoulder angle. It resembles...

- info to follow -   

Sort of an improved version of the 264 Win Mag, necked to .25 cal.   

The .25-35 Winchester, or WCF (Winchester Center Fire) was introduced in 1895 by Winchester for the Winchester Model 1894 lever action rifle. The case was based on the .30-30 cartridge.        

   Very old wildcat that was already offered by Ackley in 1941 as a standard design to be used in re-barrelled 22 Savage rifles when it became illegal to hunt with the 22 Savage in many US states. It gave hunters an affordable alternative for single shot and...

  GREENER MULTI-BALL

The fist specimen is the normal/current headstamp used by PMP. It is the same for the normal PMP and ProAmm loads, as well as the relatively new Kalahari Elite, which is loaded with Swift Scirocco 100gr. bullet The second specimen with the blue base stripe is a normal...

   Improved version of the 25-06 Remington. When developed, Ackley considered it overbore - more case capacity than what the bore can effectively utilize - that lead to a limited barrel life and was therefore not overly fond of his own design.

   The .25 Ugalde / .25 Thompson/Center Ugalde, was developed by Wes Ugalde of Fallen, Nevada, about 1987. Like the other TCU cartridges, the .25 TCU is based on a necked-up and improved .223 Remington case. Original testing by Dean Grennell was described in...

   The .25-08 wildcat first appeared in the mid to late 1950's. Its creation was inspired by the efficient .308 Winchester cartridge and its commercial sibling, the .243. Vernon Speer, founder of Speer Bullets, suggested that a Mr. P.F Lambert of Washington...

   Based on the 30-06 case, with sharp shoulder and extended neck.  

    This is the 25 Remington experimental. There was a discussion on this cartridge on the IAA FORUM. Thanks to Pete de Coux for identifying this one. This was based on the 38 Remington Experimental.    

      This is the military version (A-22286) with 94gr. CN flat base bullet loaded with 31gr. of IMR 25½ powder. Frankford Arsenal did some test during 1920 with the 25 Remington, presumably in connection with infantry tests using the Model 8A Auto...

   Old wildcat cartridge from around 1920's by AO Niedner and is one of the predecessors of the 25-06 Remington. This is a modern reproduction

Marketed as a proprietary cartridge by the Griffin & Howe Company, this was one of the developments leading up to the 257 Roberts   

New line of 5 cartridges based on the 30 M1 case. From the website: The Garin SureStrike System is a complete line of five highly efficient and accurate cartridges designed for varmint, small game and target pursuits. Differing only by specific neck diameter and...

The 25 Creedmoor is basically the 6,5 Creedmoor necked down to accept .257in diameter bullets. It is supposed to fill the gap between the 6mm and 6.5 Creedmoor.    

222 Remington case necked up to .257"   

   Based on the 6mm BR case necked up to .257"