RE: Full case resizing or neck resizing?
If you have the tools, you can partial FL neck size. You need to measure a fire formed case to the shoulder using a head and shoulders gauge from now hornady. And then screw in your sizer to match that or nock the shoulders .002" or so back.
I have FL dies that actually match my chamber perfect. I have also modifed a few dies to match a rifles headspace by milling off .004" or less. But you need to know how much and buying so low dollar tools can help.
But I have done a lot of tests and find without camming over a FL die, you tend to not have your die in square and can get erratic results in bumping the shoulder back only .002". Another option is neck dies. I like em, but they tend to cause runout.
So I pretty well stay with lee collet dies. They work much better than other neck dies, and cause much less runout.