From around 2009 and based on the Winchester Short Mag case
Cartridges
246 PURDEY
Developed in 1921 by James Purdey for a lightweight double rifle. Relatively rare as it was not a commercial success.
247 HERTER’S MISSILE MAG
One of the Herter's range with a double shoulder. Supposed to generate more velocity
25 – 6.5mm REMINGTON MAGNUM
25 BALL SIMPLEX (PROJECT SALVO)
This round was developed by Olin Corporation in July 1952 based on the .30 Light Rifle case. The bottom specimen has a lead core bullet.
25 BENCH REST
Based on the 6mm BR case necked up to .257"
25 COPPERHEAD
222 Remington case necked up to .257"
25 CREEDMOOR
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.
25 EXPERIMENTAL ON 30 KRAG CASE
This was a rimmed experimental cartridge dating from 1922 from Frankford Arsenal following the design of two rimless cartridges, (see HWS 1 p. 266). The rimmed version was made from empty 30-40 Krag (Cal. .30 Mod.1898) cases and used the same case capacity and bullet...
25 GARIN
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...
25 GIBBS
25 GRIFFIN & HOWE
Marketed as a proprietary cartridge by the Griffin & Howe Company, this was one of the developments leading up to the 257 Roberts
25 H.F. KOHLBACKER XPL
The following is an extract from IAA Journal 459:48-49 (Jan/Feb 2008) by the late Bill Woodin. H. F. Kohlbacker of Buffalo, New York, was a co-worker and contemporary of Charles Newton and was engaged in research and development for the Newton Arms Company, and later...
25 HAMBURG KRAG
In early 1912 Dr. F.W. Mann obtained 500 untrimmed Cal. 30 Krag draw pieces for experiments to design a .25 calibre high velocity rifle. Cases were formed by A.O. Niedner into various lengths and shoulder angles. Production of the .30 Krag had already been...
25 IHMSA
25 L & W SUPER
25 NIEDNER
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
25 PAG MAGNUM
25 REMINGTON
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...
25 REMINGTON EXPERIMENTAL/DEVELOPMENT
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.
25 SEDGELEY
Based on the 30-06 case, with sharp shoulder and extended neck.
25 SOUPER (25-08)
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...
25 TCU
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...
25 WINCHESTER SUPER SHORT MAGNUM
25 X 61 VOM HOFE
There is very little information out there about the 25x61 Vom Hofe. At the moment I'll keep it under European Sporting Cartridges as the parent case is the 5.6x61 Vom Hofe.
25-06 ACKLEY IMPROVED 40°
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.
25-06 REMINGTON
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...
25-20 SINGLE SHOT
25-20 WINCHESTER CF
25-21-86 STEVENS
25-25 STEVENS
GREENER MULTI-BALL
25-264 WINCHESTER
Sort of an improved version of the 264 Win Mag, necked to .25 cal.
25-35 ACKLEY IMPROVED
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...
25-35 WINCHESTER
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.
25-36 MARLIN
25-45 SHARPS
250 HEAVY EXPRESS SHORT ACTION MAGNUM
- info to follow -
250 MYRA
The 250 Myra is an Australian design and was originally developed in the late 1950's by Australian gunsmith Arthur Langsford from Melbourne, who named the company after his wife Myra. Like the 243 MYRA it is also based on the 222 Remington case.
250 SAVAGE
250 SAVAGE IMPROVED
255 JEFFERY ROOK
Target as well as rook/rabbit cartridge mainly used in Martini type or other single shot rifles
255 GS
The .255 GS (Giani Special) was developed c2010 by Vittorio Giani, a gunsmith of M.A.G. Italia di Giani & Co (Manifattura Armi Giani), owned by Vittorio and his brother Marcello Giani. It is based on the 6.5 x 55 Swedish Mauser (SC64) with an improved 70° shoulder...
256 BANG EXPERIMENTAL
This cartridge dates from 1927 for the experimental BANG semi-auto rifle by Danish designer Søren Hansen Bang. It was sent to the US for military testing and despite some minor faults performed relatively well. John Garand used the Bang design to improve on his...
256 DOUBLE TAPER EXPERIMENTAL
This was developed in June 1928 by Frankford Arsenal with a double taper case under drawing FB-9887. This cartridge was also used in the trials to determine wounding power against flesh. It was part of the trials done by the Ordnance Department to investigate sub...
256 FRASER FLANGED
This is the British version of the 6.5x53R Dutch/Romanian Mannlicher. Usually comes with a Fraser oblique ratchet bullet
256 FRASER RIMLESS
256 GIBBS
Introduced in 1913 by George Gibbs for bolt action sporting rifles.
256 MANNLICHER
This is the British designation for the 6.5x53.5R Mannlicher. British loading with LT-Cap bullet
256 NEWTON
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 the...
256 SWIFT FLANGED
This is the 6.5x53R Mannlicher but in a proprietary loading