I just slugged my barrel with a .358 boolit. I lubed the barrel with kroil and rubbed a little sizing wax on the boolit and it went through with no problem. The problem is the barrel came out .3095. This would indicate a .311 boolit to me.
This seems a little large for a 30-30 but it is an old Sears Ted Williams so i'm sure is well used. The molds I'm finding for the 30-30 are .309. I've read a couple of threads on the 30-30 including a recent one but am wondering if .3095-.310 is common for a 30-30 and I am looking for a mold suggestion in .311 for this levergun. I found some Accurate molds that are .311 but am not sure about this. I want this for target right now and would like to stay around 150-160gr