I do not use a 300 gr for hunting even though I believe a bow is not stable if one needs to tie a parachute (4 or 5” helical fletching) on it to stabilize an arrow even a fixed blade Brodhead
That is 100% wrong
I don't know what you mean by "bow is not stable" - but even a perfecty tuned bow will be benefited by a spinning arrow tiped with a broad head. Even if an arrow comes out of a bow perfectly straight, and the arrow perfectly spined, and the release was perfect - It will skid or plane without spin or fletchings.
Any target competition shooter will tell you 5” helical fletch will stop a light arrow down range. I believe if a Diamond 2 7/8” off-set fletch will not stabilize an arrow the bow is not stable
That is also 100 wrong. Again, I don't know what you mean by "bow is not stable" . But you can't use "target Archers" and the methods they use in the same sentence as "broadheads" - different animal.
I am starting to see where most of this bow/speed problem lies

