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What I've learned.
Case dimensions nearly kept the same> swagging the neck smaller by two calibers. Normally._ No problem in most sporting cartridge circumstances. To insure no problems? Trim brass prior or after its resizing to minimum tolerances.
Although the decision too or not anneal which helps to resolve cycling/battery lock up issues. That depends on whether the first fire cartridge neck & shoulder hasn't work hardened to a degree of excessive brass spring back. Something I've witnessed taking place on first firing_second firing_ or fifth firing.
I haven't reloaded military brass in many years but when I did as I recall back in the day Full-auto brass prompted its annealing quite often. (having excessive spring back) Keep that in mind if you incur battery lock-up problems. One resolve.> Small base resizer use_Or_ small base resizer & annealing.
Good Luck
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