While components are often the answer, might be other things also. When I load for mine, and it doesn't seem to really care what I use, I necksize the cases only, and load them out long. Always a chance you might have got a rough barrel, and it needs smoothing out some, also. Another thing is, when you shoot it, are you resting the rifle on the forearm or close to the hinge pin? NEF's shoot best, mostly, when rested with the hinge pin on the bags. Another consideration to try is free floating the barrel using the rubber washer trick; that seems to work for a lot of people. I"d try "mechanical" fixes like those, before spending a whole lot on different components. Last and not least, is your Scope fastened tightly and working right?