New / Old is that referring to the gun or you? If it's the gun a thorough cleaning of the striker channel and slide internals would be my first move. You don't mention how often you get a light strike, could be a hard primer now and then, I don't know if either of those brands use harder primers. Really shouldn't matter the PM9 should eat them and spit them out without issue.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."