To get 1000 fps from a 3" bbl, you will probably have to work up to above 38 spl pressure level. The best help I can offer is to start with 38 spl loads and work up. The extra 0.135" of a 357 case will mean lower pressure (excepting certain powders) and I have read reports that an equivalent 357 load will be 10% to 15% greater than the 38 spl. YMMV.

AFAIK, none of the powders you list are dangerous to download. If any one is then consider a different powder.