Check the listing for details. RUGER 77 22 Caliber Blitzschnell Speed-Lock Striker Spring by WOLFF. Color: Black, Condition: New. Listed at 14.95 USD. Wolff Springs Made in The USA are superb! For your Ruger Model 77-22. This fits 22 only. I have 22 Centerfire Springs in my store.This Spring is an Extra Power at 23 Pounds. As reference, the original Factory Strength is 19 Pounds.BLITZSCHNELL® precision speed-lock rifle striker springs for bolt-action rifles are made from the highest quality, high-tensile round section wires, as are all Wolff Springs. Each Blitzschnell striker spring has squared ends and is individually hand ground to provide flat seats, cleaned and oiled for long life and solid performance and require no fitting. Blitzschnell striker springs provide dramatic improvement in lock-time over fatigued and factory springs which can greatly improve accuracy and reliability of bolt-action rifles. Load ratings indicated are with the striker (firing pin) in the cocked position and for rifle actions equipped with standard factory parts and designs. Custom triggers and bolt modifications may change the specified ratings. Wolff also suggests that you check for proper protrusion of the striker end from the bolt face. The optimum protrusion should be about .060" and no more than .065" to prevent primer puncture. Each Blitzschnell striker spring is individually packaged and identified. Ready for immediate installation and use.USA Addresses onlyFREE SHIPPING!