Carbon arrow question

[JCJ]

Do to a shoulder injury I have had to drop down significantly in draw weight. A friend borrowed me a beautiful old Howatt Monterey recurve to shoot. The bow is 62", 33# @ 28". I draw consistently 31=31.5"

I have some Beman ICS bowhunters .500 that are 31.5 to BOP. According to the spine calculator it suggests with that shaft I should be using somewhere between 225-250 gr. on the front end to get the proper dynamic arrow spine.

I did so and I got ok but not great flight. I built up another shaft and inserted a 100 gr. brass insert. I then started trying various point weights starting at 145 (for 245 total up front) all the way up to 250 gr. (for a total of 350 up front).

What I found is that the heaviest combination with 350 gr. up front and a total arrow weight of 612 gr, flew the purest. Speed and trajectory suffered but out to say 15 yards it was no real issue. Based on penetration into my block target, I shouldn't have any trouble killing a deer at close range with the set up, a sharp broadhead and properly placed shot.

I'm not very knowledgeable about carbon arrows so my question is, is my experience being so far off the recommended  point weight common?

Thanks!

[Zach Mikita]

I've learned over the past year or so that when it comes to arrow/bow match-making expect the unexpected.  I spent literally 4 months trying to find the right arrow, so I know your uncertainty.  Another thing I have found out is the dynamic spine calculator is a tool used to approximate the correct spec. of an arrow (which it sounds that you may already be aware of this).  I finally found an arrow for my bow which is a 500 spined arrow.  The spine calculator matched with my 500 arrow almost to a dime, but I have a 400 spined arrow that bare shaft tunes true and flys great even though it doesn't make sense on the calculator.  The numbers don't add up, but it works (expect the unexpected).  Do what works and as you said with a sharp BH and hit your spot that's all that matters.  I hope this helps!

[Arwin]

Arrow flight is everything, if your only getting marginal flight from your arrows, I'd get some new ones if possible.
 If everything looks good out to 15yds, then your golden. My only worry about having such a heavy shaft and low bow weight would be deer ducking the arrow. Kinetic energy can suffer if your arrow weighs too much, which is critical with such a light set-up.
 If you went with the recommended 10-12 grains per pound, your arrows would weigh between 390-468 grains.
 Maybe others have had good luck with the set-up your describing. In my honest opinion, I would try and find a weaker spined shaft and shave off 100 grains.
 Maybe someone will be willing to trade you some shafts for the ones you have, or buy 3-4 different sizes to play with.