Quiet burp,
You've gotten very good advice above, I strongly concur with what Richp has offered to you. I use a Marlin and the 358156GC bullet is my first choice for accuracy and terminal impact on game. If you are interested in persuing a Lee mould, I would recommend the C358-158-SWC, as this bullet is fairly similar to the Lyman 358156. If you are going to invest in a Lee mould, I'd recommend the 6 cavity versions as they are so much better made than thier 2 cavity moulds. Happy shooting.
regards, and as always, my opinion only,
Graycg