If you do not reload,
I will suggest(for practice and familiarization) Win. 38 spl. 50 count white box, or
Rem. 50 count.
I believe these will have 130 to 140 grain bullets.
There are Blazer 357 158gr. JHP with the aluminum case that
are a midrange velocity(around 1150 fps).
These may or may not give optimal accuracy, but
will work for practice. There are many factory receipes.
I shoot 99+% reloads,,, but, when my weapons are traveling with me
I load them with the Blazer I mentioned above.
And lastly, nice choice of revolver.
Have a couple of 19s that I VERY much enjoy.
Regards,
Old 112