You are correct. I missed the part about the magnum. Sorry.I had a couple of friends that had the revolvers that shot both 22 L.R. nad 22 Magnum. I don't remember them being 9 shot revolvers though. It seems they were Rugers or H&R's & possibly came with 2 cylindersI think the 999 is a LR and does not accomodate a magnum round???