I have an older model 16 (pre accu-trigger) that I think has a safety problem. Are these safeties suppose to be a three position safety? The reason I ask is the safety seems to hang at the midway point. I can open the bolt at the midpoint, but if I pull hard enough it will also trip the trigger. I know there are 2 screws that will adjust the safety, but they seem to be real temperamental and I'm concerned something as simple as a winter temperature change might cause me problems. Any thought?