Hello have an Oxford 330-1 mig and it just doesn't seam like it has much welding power. I checked the voltage while welding in top setting 4-4 with a multimeter and it was reading 26-26.5 volts dc. Would this sound about right? It says on the plate on welder it should be capable of 30v on full power. Cant get into a true spray with 1mm wire and 86% argon co2 mix. Any help would be much appreciated.