Originally Posted by Jack Flash

Hodgdon lists 6.8 grains of Titegroup as a starting load for that bullet weight in a .357 Magnum. I would be concerned about going above or below published data. Set your sights on pistol reloading data | Hodgdon Reloading

If you use .38 Special cases, 4.3 grains Titegroup should get the velocity you desire. I tend to be very cautious in these matters, and prefer to only use published data from a trusted source rather than what "some guy on the internet" tells me.