The offspring from this pairing would be red sex links, yes. Pullets would all be pure partridge silkies. Cockerels would be grey, but hiding gold; they may show yellowish feathers in the neck and will throw both silver and gold offspring. Due to the presence of the partridge hen, however, the...
The leakage itself is something I would avoid when breeding a pure breed such as silkies. With a partridge, all offspring will be partridge or grey (hiding gold). The partridge would be pure for their colour variety.
Although many colour varieties may be bred in the same group, producing pure offspring, this is usually done with groups which share a common e-series and groundcolour. As an example, a black cockerel could cover dun, khaki, blue, splash and paint hens and all would produce consistent offspring...