When I had one... I used the Lyman 210 grain gas check
That bullet shoots well. It seems Lyman no longer offers the 410610. I decided I didn't need gas checked bullets some time back, so I bought the RCBS non-gas checked version for casting, the 41-210 SWC. I can't recall whether or not I've used it, but I have had good luck with all the RCBS molds I have tried.
