Interesting Daystate connection - I've an old LR90 that shoots well with .177 Superdomes.
Regarding .177 Superfields v Superdomes, we once did some comparison chrono tests through a few different springers (TXs, HW95s, 97s). The Superfields were quite a bit down on power compared to Superdomes.
As you say - always worth a try though. They should at least be a decent plinking / practice pellet.