Would like to know what sort of poundage do you use on your EA/P9 long-slide open-class gun shooting 124gr in 9X21 major. Do you need to change the recoil-spring poundage if you shoot 124 or 130gr?
You can use the original Tanfoglio recoil-spring,
EGW world-class recoil-spring and the Wolff ones. The Wolff recoil-spring ratings are 6,7,8,9,10,11,12,13,14,16,18&20lb.
For my EA long-slide 9X19(minor)open-class gun,I am using a Wolff 6lb. recoil-spring and it works very well and I like the feel. I only shoot factory ammo / 115gr fmj.