If an arrow is too stiff it will not absorb the energy the bow puts out and will kick to the side and will cause some problems with arrow flight and broadhead accuracy.
arrows with higher spine ratios will absorb more enregy that is being generated from the bow to the string to the arrow, if a super stiff arrow looses energy from a bow that is shot from a release and a in line loop is due to an improper tuned bow
the only way a stiff arrow will not shoot strait in line is due to the arrow being off the center line of the bow string, not in line vertically with the travel of the nock or the shooter torquing the bow or a combination of the 3.
Now,it is absolutely true that you have more room for error with a stiff spine than you do with a weak spine.So it is a good idea to stay on the stiff side when choosing arrows and you can even go 2-3 spine sizes up but you will most likely not be able to go down on spine more than 1 size.
you are contradicting your own statement you first said that you can absolutley be over spined then said that it is better to shoot a stiffer arrow
If you can't be too stiff then they would only need to make a really stiff arrow for everyone.
lighter arrows have weaker spine ratios, like I said before some applications need a properly spined arrow.
some bows with a hard draw force curve cam require stiff arrows
someone who is shooting a properly tuned bow shooting off a loop directly behind the arrow can shoot stiffer arrows and achieve perfect arrow flight.
if a person is shooting a stiff arrow off a loop and is experiencing poor flight it is more than likely the bow is not properly tuned or their form needs work, bottom line.
SO...... does a 28.5" Beman black ICS 340 w/ a 100 grain tip,4" vanes (418 total) sound to stiff for an 04 Patriot SC pulling 29" draw at 65#??
you can listen to whoever you want to it makes no difference to me
but as far as your arrows are concerned they are fine for what you are shooting
I would be more concerned whether youre set up is properly tuned make sure you arent getting any fletch contact making sure your rest spring tension is not too stiff or if you are using a fallaway make sure it is falling quickly.
if you havent paper tested your set up I suggest you do so to make sure the arrow is coming off the bow string strait.
If you are torquing the grip I suggest buying a bow sling and learn to shoot with an open hand to eleminate any torque you may be putting on the grip.