Can anyone tell me the sequence for tightening the action screws for one of these? It is a model 1515/16 with a 64 action made in 1974. Would it help to float the barrel and bed the action or would this be a waste of money? I cannot get better than 3/4 of an inch at 50 yards. I have tried Winchester 40 grain HP and Ruko And CCI. I have a straight 22 anschutz made in 1968 and it drives tacks, same action. Any ideas? Regards Gerald