There are, of course, two classes of bullet failure.
One is a bullet failing to perform to your expecations.
The other is a bullet failing to perform to the maker's expectations. This sometimes happens with new designs and is generally corrected shortly after the maker learns of it.
The classic example of this is the early .458 Win Mag. Win put the 500gr FMJ made by Hornady in their ammo. Early reported results were poor. Joyce Hornady went on safari and talked to a lot of the PH's about why they didn't like the round and heard about lack of penetration and the bullets "riveting" and other failures, from people who didn't know (and weren't told) he was the guy making the bullets.
Hornady went home and redesigned the bullet. After that, its performance in Africa improved a lot and it became a very popular round for biggest game.
No one can fix a problem they don't know exists. If you have a bullet that fails to perform in some way, its important the people who make it learn about that, exactly what it did, and didn't do and the specific conditions involved.
If its a matter of the bullet not doing what they expect it to do, they will fix that. If its a matter of the bullet not meeting your inflated expectaions, they can't fix that...
