Need some pressure help

[rbstern]

I usually shoot a Lee 358-105 SWC over 4 grains of Hodgdon Clays in 38 special. I want to experiment with the Lee 358-125 RF using the same powder charge, but I think this is pushing into 38 special +P pressures.

Anybody have any published loads that would be helpful, or QuickLOAD for calculating the pressure of this load?

Thanks.