I am on my second Lee Auto Prime. Other than the 2nd one being decidedly more sloppy than the first one,, they have generally done a satisfactory job. Except for priming .223 cases. With #4 shellholder installed this thing will not fully seat primers. The case pushes up far enough that about 1/4 of the primer protrudes from the pocket. So what gives?
I don't recall this problem before but it has been a long time since I reloaded .223.