yes I hugged my Power Pistol today
My Speer #13 has some data (and recall many of their handgun bullets ARE 'plated').
That said, my experience suggests a start load of 6.0g under that 115g, and a start load of 5.4g under the 125g cast.
These start loads offer safe 'room'......
"all my ammo is mostly retired factory ammo"