Prewar Junior mainspring different to postwar?

[Josie & John]

Got a sweet prewar tin grip junior in a job lot. I changed the main spring and now it won’t cock?
I dimly remember the prewar springs are different to the postwar? Am I right? Feels over sprung.
Cheers Paul

Hi Paul,

There was a difference between prewar Senior springs but not the Junior as far as I know.

Are you sure you replaced the spring with a correct one?

Kind regards,

John

[WebleyWombler]

The Protek W37p spring is ok in a Junior, I've used a few of them without problems. If you have used the W25p normal Webley pistol spring, it will lock solid before the piston bent reaches the sear

[pjbingham]

I bought a Junior spring from fleabay a couple of years back, it was a gold looking finished in a red and clear pack, when I fitted it it was coil bound so I lopped a few coils off which got it cocking but it felt horrible in all aspects,I hoped it would settle in but after about x50 shots I gave up as it was clear it would never settle down to how these old Juniors should feel. I took it out,binned it and managed to eventually find a new old stock version which was fantastic without any modification.