Heres my .02 cents worth
Generally with a semi auto pistol(of coarse),I look at the primer and look for a primer skid mark.
If you are shooting a particular load a lot and notice this skid mark(this I believe is something everyone shoud watch for, this can cause extreme wear and or breakge of the firing pin tip over time).
If I see this then there are two things to look at.
One is make sure the firing pin tunnel is clean.
If it is then you may want an extra power firing pin spring that Wolff sells.
Two is that the recoil spring is too weak causing the slide and barrel to unlock too quickly.
Generally when I see this I just buy a pound heavier recoil spring from Wolff, which comes with a extra power firing pin spring and all is good.
You may need to go with a heavier recoil spring depending on just how proud that skid mark is(experimentation of springs for a particular load).
Hope this helps.
Clarence