How do you know what you are getting from the Factory ammo mfg'rs?
Do they always mfgr their own brass,,bullets, powder, primer.
Ever get a 'factory round' with no flash hole,,or a primer seated inverted,,or a bullet seated on an angle?
Is 'Factory once fired brass' somewhat akin to being proof fired?
Remanufacturers often get their common caliber once fired brass from the gun mfg's. The mfg's fire tons of rounds of factory rounds in their ranges in function and targeting of the guns they mfg.
The brass is simply swept and bulk barreled and sold or recycled.
They have no use for it.
There have been Factory rounds which have damaged guns (and shooters). There have likely been the same from re-manufactured rounds from businesses loading them as well.
There certainly have been from a few of us know it alls doing our own
reloading.
There are lots of variables, many outside the control of the reloader. Doesn't matter if a Factory, Re-manufacturer or just you or I.
We don't make powder or primers or brass,,sometimes we make bullets.
Ever see any factory recalls for ammo,,
Do Not Shoot this Stuff!....Return to Retailer or Factory...
Remember that they already made that ammo and shipped it out to be sold to you and used in your prize guns.
Then they discover a problem. How do you think they discoved those problems..
They were told about them by unlucky users with graphic pictures.
There are no guarentees. Some are just better than others like everything else.
Choose what you want, trust who you wish to including yourself.
For now we still have choices, that's a good thing.