It's right at 1.600". There shouldn't be any recoil induced bullet pull problems in the .357, so it might slightly longer (1.605 - 1.610). Mine .357 cyl measures 1.625 but the chambers are cut so that the cartridge rims are recessed reducing OAL to the afore mentioned 1.600". Cyl thoats will take a .357" plug gauge but not a .358".
The chamber throats in FAs are very tight and leads can be quite abrubt, so you have to be concerned with the diameter of the bullet that extends into the throats. You will be just fine with any of the commercial jacketed bullets by crimping in the crimp grove (not sure about the longer 180gr Horn or Nosler (just stay within 1.600 OAL).
You should also be OK with any cast bullet that is sized to a max of .357.
Where you can run into problems is with cast bullets where the bullet in front of the crimp is larger than .357". You will have to experiment with individual bullets in your gun to determine what works and what doesn't.
Hope some of that helps.
By the way, here's a picture of mine.
Paul
