I have bought a used 25-20 marlin cl. It is on the way so I have not seen it yet. What kind of riflings do thes guns have? Are the micro-groove or ballard type? I know a lot of people talk about shooting cast bullets in them. Do any of you have any recomendations on loads. I will probably buy some bulk Rem. 86 gr jacketed bullets and some kind of cast bullet once I find a good one.