RE: Winny depot only cycle
Strong gains are never really made while using stanozolol (it's a weak androgen since it has no 3-keto group needed for androgen binding), but decent and fairly easy to maintain gains are possible. Its limited time of use however makes most experienced users opt for other steroids in that regard.
Winny, in bodybuilding circles at least, is used mostly during cutting cycles to maintain mass. Winstrol, like a DHT compound also gives a distinct increase in muscle hardness and striations in people with a low body-fat percentage. This lends further credence that it too may be a an anti-estrogen. But most likely it has more to do with the overall lower levels of circulating estrogen.
Winny is also quite effective at promoting strength because it binds very well at the androgen receptor. Short term stanozolol use can promote drastic strength, a feat often employed early in a bulking cycle (although d-bol would be more suited in that case) or late in a cutting cycle to prevent a decrease in performance