Most of these plastic tipped bullets are really nothing more than large hollow points with plastic tips in the holes. Few of them hold together and penetrate well.
I have been a hunter and a guide for many years and the number of bullet failures I have seen with this type of bullet are too many for me to count easily.
Not ALL of them are bad, but many are. The ones that have bonded cores do well, but ONLY those with bonded cores.
If I were you I’d go back to a plain 170 grain soft point.
Those have worked well for about 100 years, and they are not “broke” so they don’t need to be fixed.