That's interesting. I find that they don't perform well in my AC SS either; but they work a dream in my RazoRock Black Hawk.Today I had the third shave with a Proline B30 in the General (head satin alloy, handle satin stainless) and I must say that it was a very, very good shave! I had the same result of the first shave!
This morning I learned that - YMMV always - P30 perform much better in the General than in the Feather Artist both SS and J-Style.