one thing stands out here, and i'm not picking and choosing when i say this, but, inconsistency is a RED flag for Me.
A bad "lot" of bullets recognized by the manufacturer is one thing, bad shot placement sure, but no measure of consistency is another entirely.
That would constitute a "next" with me.
Perhaps a move back to a more proven "hunting" bullet would be a solid first step.
When whatever bullet lands where it needs to, and yet presents with 2 totally different results concerning the way it expands/penetrates I would be OUT.
Too many other choices available.