I reload and cant really stand factory ammo BUT when I purchase a new or new-to-me firearm:

I clean it (new rifles get a breakin period)
mount a scope I know is fine
Finally I shot a quality box of factory ammo
There are certain lines of ammo I won't shoot. Once you've figured out the issue, start loading cause now I'll have a whole new set of issues to deal with:
Powder
Charge
Primer
Bullet
Seating depth
What is a tack driver in one rifle might not be so in another one.



Remember, not everyone has a happy ending, so be happy when you can