If I shoot a heavy enough draw weight, they're all too weak. The real question is, do the spine charts accurately predict the proper spined arrow to use, for a particular manufacturer?

In the case of Goldtip, I'd say generally they don't for a compound shooter using a mechanical release. I've bare-shaft tested many Goldtip combinations. I've had a 28 1/2" 5575, 100 grain tip, 29" draw length, with a cam that shot this arrow at 265 fps, have perfect spine at 63 lbs. This is just one example. I've done this many times with different combinations of these parameters, and they've all tested to have perfect spine at a relatively low weight.

It seems to me, that Goldtip likes to put the ideal spine in about the middle of the rated range. This may be best, considering that many types of archers will use their arrows, including target shooters, finger shooters, and those with primitive bows. Personally, I prefer stiff arrows, over weak ones, and since I know how to determine the ideal spine, it doesn't bother me how they rate them. I'll figure out which arrow I need before I lay my money down.

One gripe I have, has to do with all manufacturers of carbon arrows. There are too few spine ranges for my tastes. In my opinion, to shoot a good broadhead with some of these arrows, it will require that the archer carefully choose an arrow setup that will match his bow, or be willing to raise or lower draw weight to hit that perfect spine. The first option requires experimentation with tip weights and arrow lengths. Few hunters do this. Most use the shortest arrow they can get away with and put a 100 grain tip on it, no matter what the consequence.

Hunters spend weeks researching which bow to buy, when that decision makes almost no difference. They should be putting that kind of time into the ideal arrow setup for them. Yet, I usually see the typical afterthought, "Oh yea, add in a dozen of whatever arrrow you have that is cheapest." Maybe the day will come when shop owners, as well as hunters, put the importance of proper arrow selection into it's deserved perspective.