Well, Scooby...I say that with the following in mind; I don't consider ANY of my BP revolvers a defense weapon (against two-legged critters, anyway). Not when I can pack one of my modern defense guns. Sure, any one of them (brassers included) would likely do the job thwarting unruly muggers of the four-legged variety, but I'd sooner use something with a little more oomph. And with the two-legged variety...no question.
Bottom line; if I think I'm gonna need it, I have better tools for the job.
I re-read my post and it sounded a little disparaging. It was not meant to be. The brasser is a fine weapon in it's own right and I own several and have owned more yet. I have yet to find me a sweet G&G and when I do, I will buy it. A Spiller & Burr is also on the short list for someday.
Back to the OP's question...while RS is not my powder of choice for a revolver, if you feel the pressures are in line with 3F and you feel comfortable shooting it, go right ahead. However, I think 30gr might be detrimental to the overall longevity of a brasser in the long run. But that's just my opinion, and mine only.