Quote Originally Posted by junglie View Post
my advice is don't put a titan spring in it, nowt wrong with the standard bsa springs.With a titan it'll be hard to re-assemble & harsh to shoot + may well be over the power limit unless you cut the spring down & re-fininsh the ends.
You have to cut the spring down. There's absolutely no way a full one will go in and make the rifle nice to shoot. I assembled mine by hand by clamping the trigger assembly unit onto a low lying clamp and then used body weight to compress. Taking 7 coils off was enough to get a decent amount of preload without over doing it and making the firing cycle too harsh.

Nothing wrong with standard springs but the last one I had for my 635 didnt have enough compression on it - no idea why. Came from Chambers who are certainly trustworthy. Went with Titan in the end because I've used them plenty of times without fault - but you do have to shorten them.