Your swollen primers are a head space issue with the breach plug. Mine had the same problem. PR sells a stainless one that takes care of the issue. Another thing to watch for is action screw torque when servicing the breach plug. It can change your poi.
i had my ML-2 dressed up a bit, bedded and crown etc and put a savage Thumbhole stock on it but it will hold groups just over an inch at 200 yards.