I have used cor lokts that were hammer flat on the tip from poor handling. They shot minute of heart/ lungs from a hundred yards all day long from an old 30-30 lever gun with peep sights. I did in fact manage to hit a running doe with one at 75 yards and she couldn't tell the difference between them and a fancy perfect ballistic tip.

Incidentaly, I have heard recently that the tip of the bullet is less relevant to stable flight than the balance of the bullet and the tail. That's why high end hollow point match target bullets can have inconsistent tips yet shoot very well.