The gauge is NOT your chamber.
Have you checked any to see if any that you think you 'fixed' actually fit your chamber?
Resizing your cases to fit a generic case gauge is where your problems started and why they will likely continue.
You 'could' buy one of these:
https://www.hornady.com/headspace-bushings#!/
and know for certain what is going on with the headspace in YOUR particular barrel. Could also be used to tell you what the gauge you have is set up at using a piece of fired brass and measuring what it reads as you size it down to 'fit' between the steps.
I would bet money that as you seated those rounds deeper you pushed your shoulder back which is why the rounds seem to 'fit' now. Unless you have a seriously oddball chamber there is no darn way that the ogive of a 62 grain Hornady bullet was hitting anything inside your actual chamber. On most 5.56 chambers that bullet would fall out of the case before coming close to hitting any sort of lands. You sure as hell are not coming close to the lands if the bullets still fit in a regular magazine.
What they do or how they fit in the gauge you have means nothing. The chamber in your barrel is what matters...
You would be better served going forward if you tossed your case gauge in the trash and learned how to measure your actual chambers (with the Hornady tool I linked you to above) and set your dies up according to those measurements. Your case gauge not jiving with the actual chamber in your barrel is why you are where you are now and having problems.
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