Depends on your needs and shooting style.
Cheaper components, pulls, etc- not what I would use for precision stuff.
But I shoot and train a lot at more CQB type distances- so long as it hits close to my POA, we are good. The skills I am working on are speed, presentation, use of cover, multiple target engagements, moving targets, shooting while moving, failure drills, hostage drills, etc. Basically all useful stuff for the kind of thing I have been trained for, and am most likely to ever need. Nowhere there is it super important that I shoot a sub MOA group. Basically- 99% of the variability on hits will be me, not the gun or ammo. So cheap is fine. And even a failure to fire is OK in a training environment, as you should know malfunction clearances and transition drills, so those primer 2nds might be OK for that. I have plenty of ammo, unlikely for my training ammo to ever pull double duty as real world defensive ammo.
All that being said- I bought fresh WIN #41 primers for doing up full power 5.56 defensive type loads…. And guess what- those lots of primers are having burn through problems as detailed in a couple threads here, damaging bolts, etc. I would not have considered those to be sub standard primers, but I guess those batches are…. so- best laid plans and all that!
Would I use pulls or primer 2nds in my .243 for deer, or .300 WM for elk? No way, not unless I had nothing else available. Those guns might get dozens of rounds thru them in a year though, while others get thousands each.
I guess the more rounds I put thru a gun, the cheaper I am willing to go on its ammo…. And I reload so I can shoot a lot more, and weather the shortages. If that means I need to tinker with things a bit, so be it- I like tinkering almost as much as I like deals.