As soon as the 243 Winchester was launched in the 1950's and cheap brass became available, wildcatters began necking the 243 Win down to .22 cal. There are two major versions of the 22-243 Win. The first one is the standard 243 necked to .22 cal with no...
22-15-60 STEVENS
The following article is an introduction to this cartridge by it's designer, Charles H. Herrick of Winchester, Mass. {from SHOOTING & FISHING, June 17, 1897}: (By John T. Dutcher - From an old ICCA article done around 1987) "This...
25-20 SINGLE SHOT
22/30-30 ASHURST
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...
25-06 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.
22 WINCHESTER CENTER FIRE
25 WINCHESTER SUPER SHORT MAGNUM
22 WALDOG
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...
22 VARMINTER
This is the predecessor to the 22-250 Remington. There was also an article in the Feb 1991 ECRA Journal that mentions the 22-250 Varminter in Australia as well. According to the notes it was "...Formed from the .250-300 Savage cartridge case by reducing the neck to...
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...
22 UNKNOWN #2
22 UNKNOWN #1
25 SEDGELEY
Based on the 30-06 case, with sharp shoulder and extended neck.
348 WINCHESTER
340 WEATHERBY MAGNUM
340 HOWELL
Cartridge by Ken Howell, based on the 30-06 case, but lengthened to 2.6" as opposed to 2.494" for the standard 30-06.
340 GIBBS
34 WINCHESTER CENTRE FIRE
338-404 EXPRESS
338-378 WEATHERBY MAGNUM
338-378 KT
The 338-378 KT was designed by Elmer Keith and Bob Thompson in the 1960's as a long range elk cartridge to be used with slower burning powders available at that time. They kept the Weatherby double radius shoulder but shortened the case 1/4" to better suit case...
338-284 KCG
Wildcat based on the 284 WIN case. Designed by Hawaiian based gunsmith Mark Pinkston and manufactured by Kailua Custom Guns, Hawaii this was an attempt to offer a 338 cal rifle for carbines.
338-06 JDJ
338-06 A-SQUARE
338-06 ACKLEY IMPROVED
338-06
338 YOGI
Developed by David Tooley, this is basically a 338 Lapua Improved
338 XTREME
Developed around 2007, the 338 Xtreme (338 XT) is based on the 505 Gibbs case with a 35° shoulder.
338 WINCHESTER MAGNUM
Interesting box that came out of Zimbabwe. The crest on the box bears resemblance to the SLADE Family Crest, but I have not found any other info on who Nimrod Cartridges were.
338 WINCHESTER MAGNUM PROTOTYPE
Prototype round by Winchester resembling a current factory load. the other one is the 264 Winchester prototype
338 WHISPER (7mm BR CASE)
The 338 Whisper is part of a range of cartridges developed by JD Jones from SSK Industries. The parent case is the 7mm Bench Rest, necked up and fire-formed.
338 WHISPER #2 (FIREBALL CASE)
338 THUMPER
The 338 Thumper is one of a new line of cartridges by Subsonic Hunter in Winter Park, Florida designed for hog hunting.
338 SPECTRE
Like the .458 SOCOM, the .338 Spectre cartridge was developed specifically for the AR-15 family of gas-operated, detachable-box magazine-fed firearms. The cartridge is intended to fill the gap between traditional pistol caliber cartridges and...
338 SNIPE – TAC
The 338 Snipe-Tac was developed in 2001 for extreme long-range hunting and target applications. The parent case is the 408 Chey-Tac necked down and shoulder improved to 35 degrees. H2O capacity is a whopping 165 grains and velocity is well over 3,000 fps.
338 SCOVILL
338 SCORPION
This is basically a 338 x 39 (or the 7.62x39 AK-47 case necked up to .338"). It is similiar to a current military cartridge used in Russia, namely the 9 x 39.
338 RUGER COMPACT MAGNUM
Based on the 375 RUGER, the 338 RCM is a shortened cartridge, but with ballistics that will match the 338 Win Mag.
338 REMINGTON ULTRA MAGNUM
338 REAPER
The 338 Reaper is an improved 338 Lapua and was designed by Dallas Lane from Lane Precision Rifles in Pocatello, Idaho.
338 RAZOR
The 338 Razor is another cartridge designed by Alaskan ELR shooter Pro Martusheff (aka Swamplord) from Precision Rifled Ordnance. It is the shorter case version of the 338 Headhunter built specifically for Remington 700 and Winchester Model 70 actions. The case is...
338 NORTHERN MAGNUM
Wildcat cartridge based on the 8mm Rem Mag case necked up to .338"
338 MARLIN EXPRESS
338 LEHIGH
Still under development as at Dec. 2014, it is based on a shortened 7.62x39 (AK-47) case, necked up to .338. This one is loaded with the Lehigh controlled fracture bullet.
338 LAPUA MAGNUM IMPROVED 40°
This is an improved version of the 338 Lapua for long range shooting.
338 JARRETT
338 IMPERIAL MAGNUM