Re: Bushing full length or neck die?
You can F/L new brass, then neck size for 3 or 4 loads before you need to full size and push thre shoulder back a little. Neck sizing will improve brass life. However, if the rifle is to be used only for hunting, F/L each time to avoid hard chambering.
Redding dies are OK, but you might like the Harrels F/L bushing die. Send them 3 fired cases and $70. In a week, you will have a custom fit to your chamber die.