Witness Hunter,2 xtra recoil springs

[transman]

Picked up my new Hunter today,noticed 2 extra recoil springs,different weights,anyone know what these are intended for?This baby shoots like a dream,took my Witness carry(4inch)and Colt Elite(5inch)just to compare.Fantastic piece!

[The_Shadow]

If they are of different weights they are probably used to tune the slide velocity for different impulse ammo. 

[Intercooler]

Yea man! I own three (pick up the third tomorrow) and they are.

Those are some weak springs. You can play around with them... I did!

http://10mm-firearms.com/factory-10mm-ammo/new-test-full-power-10mm-with-spring-swaps/

I'm really starting to wonder if we don't create other problems by over-springing some too?

[sqlbullet]

In general, use the heavier spring unless you have having issues with short stroking.

Over-springing can cause issues, but if you stay out of the extremes you will be fine.  In general a 20-22 lb recoil spring should be the top end limit.