Re: outside neck turning???
Unless you have a match chamber you will not really find a need to neck turn brass. The factory chambers are generous enough that you won't see any improvement. As an example; my Browning 7mm rem mag brass, after sizing measure .3080" at the neck. The SAAMI chamber spec is .3150". Neck turning would have absolutely no effect on this rifle as a result.
Life's too short to shoot an ugly gun.....