My 22 wildcat is only reading 860 fps with JSB 18 grain. Is that typical for that pellet? Can the velocity be increased to the 920s by tightening the Hammer spring and will it still get a nice shot string and grouping at a higher velocity?
Good idea on using a second adjustment nut as a 'back up' nut. I have noticed the nut does turn (ccw) after several shots."fz1yamaha"I took a 10mm deep well socket heated with a torch ,set it on the hammer spring adjuster a few times -I had the action aiming down,with the allen key through the hole of the socket ,the block never got over 130f on my thermometer ,learned the hard way -they are soft .buy one, and use one, for a back nut. AoA sold me a old brass style without the stem ,I like them.Go slow heating and increasing speed dont let locktite shavings fall down in once it frees up lay it on its side and clean all of it out..dosent take much to get on the other side of the springs use- kinda acts like a rabbit punch then,looks right if ya only shoot afew shots crony ,as i backed out fps increased then slowed to the fps i liked. The I checked again and it is a lazer again