What is the best ammo for a 357 Windicator with a 2 nickel barrel?

Typically the best ammo for your Windicator is what shoots best in it.There are many different brands and weight of ammo available for you to try.I find that most every firearm likes one or two loads the best.It will be up to you to find out.If you do reload centerfire ammo then it is really enjoyable to try different weight bullets and powder combinations to bring out the best of your firearm in terms of accuracy and velocity.