Red arrow shows the imprint of the feed ramp. and Starline cases loaded with the same charge of Silhouette. location of the Nowlin barrel's feed ramp and where cases were measured for wall thickness. The Vihtavuori data is more expansive (three gunpowders, four bullets), but published velocities fall short of Winchester's factory loads.Ī. WAP was discontinued, but revived as Ramshot Silhouette. However, Winchester's old 15 th Edition Reloader's Manual also has data for Winchester Action Pistol (WAP) gunpowder. The current Hodgdon data is limited to one powder (Winchester 231) with limited performance (maximum of 1300 fps with a 125-grain JHP). But handloads can bring out the full potential of this cartridge. The limited selection of factory 9x23 ammunition all represent full-power loads. Starline brass is discussed in more detail later. If the pressure is too great, the case can rupture exposing the shooter (and gun) to very dangerous case fragments and a blast of hot, high pressure gas. High pressure can make the brass expand too far and bulge in the unsupported region. The test gun has a conventional feed ramp and the Nowlin barrel's chamber leaves a portion of the case unsupported. These cases bulged excessively in the unsupported region of the Nowlin barrel. The COR-BON ammunition was loaded in Starline 9x23 Comp cases (footnote 1), Starline's version of the 9x23 Winchester. If you want something different, you have to load your own. RBCD loads a 60-grain Total Fragmenting SP bullet at 2625 fps. COR-BON offers three loads in the 9x23 Winchester, a traditional 125-grain JHP at 1450 fps, a 100-grain Pow'RBall at 1600 fps, and a 125-grain Barnes XPB copper HP at 1350 fps. 357 Magnum factory 125-grain loads from a 4" barreled revolver. These loads yield 587 and 583 foot pounds (ft.-lbs.) of muzzle energy, respectively. Winchester offers two factory 9x23 loads, a 124-grain SP bullet at 1460 fps, and a 125-grain Silver Tip HP at 1450 fps. 38 Super's COL to fit in similar magazines. In practical terms, it's wise to load them similar to the. The Winchester factory rounds with flat nose bullets measure at 1.230 - 1.245", which is typical for this bullet design in the. The 1.300" round would not fit in a Para Ordnance. They fit, but not when the bullet was loaded just 0.005" longer (1.305"). I tried some 1.300" length 9x23 rounds with round nose bullets in two Chip McCormick 1911. The 1.300" length is a bit long to fit in some magazines that house the. The 9x23's SAAMI maximum cartridge overall length (COL) is 1.300" compared to the. 38 Super +P, whose case is the same length of 0.900" (Figure 2), has a SAAMI pressure limit of 36,500 psi. rifle round! Compare that to the 9mm Luger's 35,000 psi and its +P limit of 38,500 psi. The 9x23's Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) maximum average pressure limit is 55,000 pounds per square inch (psi), the same as a. The 9x23 is also a longer cartridge overall, and requires a full-sized pistol frame whereas the 9mm Luger can be housed in small-frame pistols. Winchester's 9x23 brass has an extra-thick case wall that allows this cartridge to run at high pressure without concern of a case blowout in the unsupported region of a conventional, non-ramped barrel. The 9x23 case is 4mm longer, but more importantly the 9x23 operates at much higher pressure than the 9mm Luger. Both are tapered cartridges with nearly identical neck, head and rim dimensions. In simplistic terms, the 9x23 Winchester is a stretched out 9mm Luger (pictured). 357 Magnum performance in a semi-automatic pistol. The 9x23 Winchester cartridge is a powerhouse round that few have heard of.
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