Neck vs Full length resize

[Predator]

I am new to reloading and keep hearing conflicting reports as to whether to full length or neck size my brass. Some say accuracy is the same for both methods, others say it shortens brass life if you full length resize all the time. I am confused. I am looking for the most accuracy that I can squeeze out of this rifle for target shooting, but I will also use it for hunting in the fall and I don't want feed problems etc... As well what method do you like to set up your dies for neck sizing? Do you use a comparator, or use a dummy round and smoke the bullet or are there other methods I haven't heard of? Thanks