Yes it de-primes on a standard neck sizer.
Not the same but you could experiment with the full length sizer by stopping just short of the neck shoulder junction. We used to call this partial sizing and it is not the same as using a true neck size die. But it will tell you if your cases will work in multiple rifles before you buy new dies.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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