thats right. nandrolones are anabolic androgenc steroids that bind specifically to the androgen receptor.
trenbolone, dienolone, deca, nor testosterone, methoxy gonadiene, norbolethone, are all " androgens".
all steroids have binding ability to the progestin receptor due to the nature of their structure, and have varying degrees of activity.
but calling an androgen a progestin because it binds with the p.r. is stupid unless you are going to say all androgens are progestins.