Recoil Calibration Packs are offered to allow the shooter a choice of recoil springs to calibrate the recoil function when the correct spring rating is not known. The shooter starts with the strongest spring and works down until the desired recoil function is obtained. Each Pak contains several recoil springs and offers a savings over buying them individually. Three extra power firing pin/striker springs are also included.
Colt 1911 length pistols and clones, including models from Para Ordnance, Kimber and Springfield Armory. These pistols all
have 5" long slides.
Factory 1911 recoil springs are 16 pounds in 45 ACP, 14 pounds in 38 Super, 9mm Luger, 38 Special Midrange, Colt Ace 22 conversion kit, and 19 pounds in 40 S&W.
The Delta Elite 10mm uses a dual factory spring rated at 23 pounds. Single recoil springs require that the Delta Elite recoil spring guide be replaced with a standard 45 ACP recoil spring guide.
The coils in this spring are not spaced evenly.
Variable power springs are typically used on compensated pistols or when shooting lighter target ammunition.
Recoil springs fit over a pistol's guide rod and control how the pistol's slide functions.
In general, heavy loads need heavy springs and lighter loads need lighter springs. There is no hard and fast rule as to how
much "Spring" a pistol needs. Too light a spring and the pistol opens and closes early and hard, increasing the felt
reoil and battering the frame. Too heavy a spring and the slide is hard to open and may not cycle completely, jamming the
Shooters who are using +P ammunition or self defense ammunition will likely need heavier recoil springs.
Shooters who are using target ammunition may be able to use lighter recoil springs.
Installation requires disassembly and reassembly of the pistol.
Every recoil spring package contains a free extra power firing pin spring.