Well, in some chamberings I have several different rifles. Usually there will be one or more of them that are accurate enough to set aside cases that are only fired from each of their chambers.
I also have two sets of dies for those chamberings.
One is set up to set back the shoulder to Saami specs and the other is set to 75% reduce the neck diameter length.
It does make a difference in some rifles.
I do this with a 308Win, which is in reality a 7.62 Palma Match chambering and a Remington 700, with a very tight factory chamber and Varmint barrl-el.
The other two rifles are ordinary sporters with factory barrels that shoot acceptably for what they're used for.
I do the same for 7x57, 8x57, 30-06, 6.5x55, 7.5x55, 223rem, 303Brit, 30-40 Krag, 25-35Win, or any Berdan primed cases. If I only have one rife in a particular chambering, then the cases are partial neck sized only.
It saves a lot of wear and tear on cases fired in rifles with chambers on the max side of mean specs or in some when their chambers are cut a bit deep, but still shoot well with fireformed cases.
Today's chambers are usually very close to median spec and full length resizing might be indicated. I wouldn't neck size only for semi auto rifles either.
At the price of cases today, whatever I can do to extend their life, safely, I will do.
I have some 30-06 Dominion Ctg Co. cases from the sixties with well over 80 reloads on each of them. They get a full-length annealing treatment every 5 shots, trim if needed, and bump back the shoulder a couple of thou. I shoot them exclusively through a Remington Model 721, with a very tight factory chamber, that sits in a custom AAA Birds Eye Maple stock and is fitted with a detachable magazine.