I just broke a 6 month old slide stop yesterday so I am going up to a 14lb recoil spring.
This is from the OP !
So, your gun busted a slide stop
and keeps breaking optics? I'd say your recoil springing
* isn't stout enough (either too low of a spring rating OR simply worn out OR completely wrong spring) for the energy in the cartridges you are shooting.
* Remember on recoil, the
recoil spring AND the
hammer spring work together to slow and cushion the rearward travel of the slide. One or both of those springs needs replacing, or you need some different ammo.
In my experience, your brass should be traveling 4 to 8 feet upon ejection. The acceleration of the slide as it travels rearward directly impinges upon the case during ejection. Thus, the ejection distance is directly proportional to the energy in the slide, which of course is 100% directly related to the ammunition you are shooting.