What he is saying is when a heavier tip is added to the front of an arrow the arrow
will actually bend/paradox more as the arrow is being thrusted foreward thus
weakening the spine some. This is not always a bad thing though. I have found
on my GT 55/75's I shoot tighter groups with 125 gr. tips compaired to 100 gr.
tips. Many target archers use 300gr. tips, or heavier, to weaken the spine of their
stiff line cutter shafts to gain accuracy shooting indoors. As stated above the only
way to see if it helps you is to do it. You might want to try 125 gr. fieldpoints first
to see if it helps your grouping before sinking money into new broadheads. JMHO.
Let us know how it turns out.