RE: Any guess what IRR will be on updated FSCD thanks for your reply, I used the numbers from the FS just because I don't know how to recalculate with current prices, as lead is much higher, but zinc is lower. Just didn't want to give the bears any more ammo by making up numbers. Is there a formula I can use to find IRR? I would like to use worst case numbers with 6 deposits just to show how this is an investment of a lifetime, but my lack of knowledge is slightly prohibitive. Any help would be greatly appreciated. TIA