For a while I shot the rcbs 200 fn bullet (212gr of ww) with 12.5 or 13gr W296. It was stout, but it shot well. I havent done as much with the rcbs 180 but I'm going to give it another try. Some folks used 12gr H4227 with the 200gr and had good results. It was a lot more pleasant to shoot than the 296 load.
Some 357 barrels had long lead-ins but mine does not. The rifling is very abrupt at the end of the chamber. I used small rifle primers. The usual load disclaimer is in effect. Richard