Quick question about spine weight.  I shoot a 55# at 27" recurve.  I've had the best consistency with Beman ICS 400 shafts, although even after as long as I have been shooting (about 4 years now), I still don't have the consistency I would like to have.

Yes, I shoot off the shelf, and yes, I replace the plastic vanes that come on the shafts with feathers.

Now that I'm down to my last three Bemans, I'm looking to buy some more arrows.  Looking around at all the various spine measurements, it seems every brand has a different way of measuring their shafts.  I'm wondering if there is a standard measurement that I should be looking for?  If so, what is it? 

Thanks,

Johnny