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9×25mm Dillon

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25: 452: 93: 419:, to make pistols shoot with as little muzzle rise as possible to allow faster follow-up shots on target. A muzzle brake works by diverting gases perpendicularly relative to the barrel to reduce felt recoil. The greater the gas volume, or the pressure that gas is at, the more force the compensator or muzzle brake creates. Competitors could "feed" a compensator more gases than comparable 414:
Most shooters, looking at the 9×25mm Dillon today, focus on the extreme velocities of which it is capable. A 115-grain bullet at 1,800 fps is more than is needed for competition. There, a 115 only needs to be going a bit over 1,500 ft/s to qualify for major power factor. Competitors in the late 1980s
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Around 1987, Randy Shelley, an employee of Dillon Precision, necked down 10mm Auto brass to 9 mm. His goal was to get as much slow-burning powder in the case as possible in order to drive a 9 mm bullet to the velocity needed to qualify for the then-IPSC major power factor of 175. The short-necked
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What put an end to the 9×25mm Dillon in competition was lowering of the USPSA major power factor from 175 to 165 (160 for IPSC competition) which improved the safety and effectiveness of .38 Super (and later 9x19 "Major") loads to a point that the extra rounds that would fit maximum-allowed length
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Making the 9×25mm Dillon is fairly easy. Dillon Precision makes the necessary resizing die, and reliable reloading data is easily found. Most people use 115- to 125-grain bullets, but bullets with weights as low as 80 grains are used, too.
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loads. However, the muzzle blast also increased significantly, and the resulting recoil re-direction could be excessive with reports of some loads causing compensated pistols to recoil downwards.
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pistol cartridge is probably the closest ballistic twin of the 9×25mm Dillon. These cartridges are both necked-down 9 mm variants of the 10mm Auto cartridge, though they dimensionally vary.
516:: As of 2016, DoubleTap offers six 9×25mm Dillon factory ammunition loads from 80 to 180 grains. Underwood Ammo offers three 9×25mm Dillon factory ammunition loads from 90 to 125 grains. 415:
and early 1990s who were using the 9×25mm Dillon used the additional powder available over .38 Super to produce more gas in the compensator, or
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for this cartridge is 406 mm (1 in 16 in), 6 grooves, Ø lands = 8.79 mm, Ø grooves = 9.02 mm, land width = 3.07 mm and the
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magazines outweighed any muzzle flip advantage from the 9×25mm Dillon. Once worn out, pistols were often retired or rebuilt in .38 Super.
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developed loads with less powder to mitigate the blast, but discovered there was little advantage over a similar load in .38 Super.
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semi-automatic pistols. These pistols are originally chambered by Glock for parent cartridge of the 9×25mm Dillon, the 10mm Auto.
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database, the 9×25mm Dillon case can handle up to 250 MPa (36,259 psi) piezo pressure. Since there are no
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and steep-shouldered cartridge holds twice the powder of a .38 Super Auto case.
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Americans define the shoulder angle at alpha/2 = 30 degrees. The common
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9x25mm Dillon - 2nd Edition Lyman Pistol and Revolver Handbook, Page 91
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The 9×25mm Dillon was used by several notable IPSC shooters, such as
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limits and data sets for wildcat cartridges, this data is unproven.
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Marshall and Sanow, Street Stoppers, p. 139, Paladin 2006
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125 gr (8 g) FMJ-FP Match or Speer Gold Dot JHP
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Test barrel length: 6 in (Lone Wolf SS 1:16 in twist)
387:Open guns. The cartridge is made by necking down a 927: 729:9x25 home page, October 7, 2001 archive accessed 97:9×25mm Dillon (left) next to a 10mm Auto (right) 637:DoubleTap factory loaded 9x25 Dillon ammunition 789: 705:"1911 Pistols - Freedom Series - Longslide" 796: 782: 508: 458:9×25mm Dillon maximum cartridge dimensions 324:115 gr (7 g) Speer Gold Dot JHP 69:Learn how and when to remove this message 32:This article includes a list of general 904:Third generation derivatives (based on 434: 928: 777: 552:– 10mm Auto case necked down to 5.7mm 439:The 9×25mm Dillon has 1.48 ml (22.8 18: 13: 302:90 gr (6 g) Gold Dot JHP 38:it lacks sufficient corresponding 14: 952: 737: 598: 460:. All sizes in millimeters (mm). 450: 91: 23: 697: 666: 641: 630: 618: 609: 589: 349:1,495 ft/s (456 m/s) 346:147 gr (10 g) FMJ-FP 341:802 ft⋅lbf (1,087 J) 338:1,700 ft/s (520 m/s) 330:827 ft⋅lbf (1,121 J) 327:1,800 ft/s (550 m/s) 319:888 ft⋅lbf (1,204 J) 316:2,000 ft/s (610 m/s) 308:881 ft⋅lbf (1,194 J) 305:2,100 ft/s (640 m/s) 269:37,500 psi (259 MPa) 1: 840:Second generation derivatives 674:"Lone Wolf 2008-2009 Catalog" 582: 313:100 gr (6 g) FMJ-RN 814:First generation derivatives 804:Cartridges derived from the 499: 352:730 ft⋅lbf (990 J) 229:1.250 in (31.8 mm) 213:.0550 in (1.40 mm) 7: 936:Pistol and rifle cartridges 543: 447:O cartridge case capacity. 221:.990 in (25.1 mm) 205:.425 in (10.8 mm) 197:.425 in (10.8 mm) 189:.423 in (10.7 mm) 10: 957: 615:GunGames magazine Issue 1 572:List of handgun cartridges 398: 181:.380 in (9.7 mm) 173:.356 in (9.0 mm) 903: 880: 846: 839: 813: 744:Underwood: 9x25mm Dillon 360: 351: 340: 329: 318: 307: 296: 293: 290: 286: 282: 278: 273: 265: 257: 249: 233: 225: 217: 209: 201: 193: 185: 177: 169: 158: 148: 143: 135: 125: 120: 111:Place of origin 110: 102: 90: 83: 509:Commercial availability 261:Centerfire large pistol 53:more precise citations. 186:Shoulder diameter 577:Power factor (pistol) 379:developed for use in 274:Ballistic performance 883:6.8 mm Remington SPC 826:6.8 mm Remington SPC 435:Cartridge dimensions 170:Bullet diameter 867:9×25mm Super Auto G 808:and its derivatives 494:9×25mm Super Auto G 253:1 in 16 in (406 mm) 226:Overall length 941:Wildcat cartridges 709:fusionfirearms.com 538:Available Firearms 411:and Jack Barnes. 250:Rifling twist 210:Rim thickness 194:Base diameter 178:Neck diameter 121:Production history 923: 922: 899: 898: 764:Cartridge drawing 711:. Fusion Firearms 514:Loaded cartridges 477:According to the 474:is large pistol. 377:wildcat cartridge 369: 368: 356: 355: 202:Rim diameter 79: 78: 71: 948: 844: 843: 798: 791: 784: 775: 774: 749:Dillon Precision 721: 720: 718: 716: 701: 695: 694: 692: 691: 685: 679:. Archived from 678: 670: 664: 663: 661: 660: 651:. 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Index

references
inline citations
improve
introducing
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United States
Dillon Precision
10mm Auto
Rimless
gr H2O

wildcat cartridge
USPSA
IPSC
10mm Auto
9 mm
Rob Leatham
muzzle brake
.38 Super
Rob Leatham
grains

rifling
twist rate
primer type
QuickLOAD
C.I.P.
SAAMI
9×25mm Super Auto G

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