I soft tuned my old Shadow 1000 down to about 660fps mainly by reducing the amount of preload created by the plastic apacer on the rear spring guide. I replaced it with a stack of washers about half as high. Shortened the tophat to cut some weight. It didn't have a teflon space though. Also shortened the barrel to 14" to improve the handling and balance. Now it's a fun all day shooter.
JK's Airgun Forums, moderators, and administrators are not responsible for any problems that may occur from reading or using content posted on this forum, as they are the exclusive responsibility of two parties: the person who posted it and the person who acted on said posted information.Use of our forums by people under 18 years old is allowed only with legal guardian(s) present.