It’s been done that way, even though the best practice is to get a go gauge. I’ve rented them from 4D for something I didn’t want to buy.
Opinions and experience will vary but it’s been mine that today’s new factory ammo is undersized, that is to say the headspace is “short” of SAAMI. Until you get one that isn’t. . If I were going to headspace with a new case, I’d try more than 1 before locking it down.
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