Not all Dickson's are Round Actions and not Round Actions are Dickson's. Generally, Round Actions were built to a high standard of workmanship. They do not, however, posess any particular magic as to design, materials, or workmanship. One at a high level of Current Condition may well digest a lot of shells befor the first hic-hupp. I'd strongly suggest you satisfy yourself as to what happens, though, at that hic-hupp.
They are a bit of a fad at this time and prices reflect such. They are quite scarce, especially in high condition. Approach with more than usual caution.