With precious few guns on the market chambered to fire it, and even fewer load options for those guns, the 5.7×28 mm FN cartridge has seemingly been on life support for most of its 30-year lifespan, kept alive only through the patronage of a small but dedicated fan club and select military/government agency adoption. That’s a shame, because it’s an interesting little chambering, offering several intrinsic design advantages, and it is an absolute hoot to shoot. Caught in a self-perpetuating loop where a deficit of firearm options has led ammunition makers to deem it unworthy of their finite production resources—and vice versa—what the 5.7 mm has really needed to help resuscitate it was a major gunmaker willing to break the vicious circle by taking a chance on it. That it was Ruger to step up to the plate, with its December introduction of the Ruger-57 handgun, should not come as any great shock to those familiar with the Southport, Conn., company’s reputation for seeing opportunity where others just see risk.
Operating via delayed blowback, the Ruger-57’s barrel moves rearward with the slide only about 1/4″, but its long enough to allow the projectile to leave the barrel and for pressures to drop to safe levels.
