blue printing can require machine work but their are several things you can do yourself to make the gun shoot better. You can lap the locking lugs, check head space, bed the action with pillars, install a good trigger, fit the stock, shorten the lock time, work up a load. Their are several other things but they will require machine work like squaring the receiver and squaring the bolt face, and if possible replace the barrel. Do what you can yourself and see what happens.