Guys I have a chance to pick up a 45-70 in a marlin full size lever(22"barrel). Condition is good and I think the price is ok ($459). It is an older pre safety model. Only thing I am not sure about is the Micro Grove barrel and cast bullets. Now I have read post after post and I just can not get a FACT for an answer. Does a micro grove barrel play nice with cast bullets? What Lee mold works well for the 45-70 if any? Should I steer clear of a micro grove barrel? I am new to 45-70 round all together. Advice welcome and as always thanks in advance.