Depends what kinds of silhouettes. For Field Pistol / Hunter Pistol, I always used 16.5 gr. 296, CCI 550's and a Sierra, Hornady or Speer 158. This load is much heavier than what is necessary for that game but was always accurate in my guns, and is my .357 hunting load, so it served as good practice for that venue.
The same load will also work for chickens and properly set pigs and maybe tukeys on the Big Bore Long Range Course, but a person will be better served using 180's or 200's for those further targets, and that bullet weight is really required for any dependability on rams.
So, on the shorter course the .357 has plenty of extra power. For the long range course, it requires some special loading of heavy bullets with accurate maximum charges - a game best suited to International Class shooters and skilled reloaders who just want to use a .357. Most will use 296 or H-110. Some will use the 200 Hornady Spire point in .38 Special cases, etc.
For the novice shooter using 158-170's, it's a good cartridge to learn to hit the long range targets with...but you'll lose some that don't fall.