#1 you have no idea what velosity your current load is.
#2 G19 not ideal for major it will work for a while but.
#3 you asked a yes/no question.
#4 there is more to loading major than just adding more powder.
What may be safe in one gun may make parts fly in another.
You have no idea what velosity your current load is .
So do you have a chrono? Again there is more to loading major
than just adding more powder.