just to give you an idea of what I shoot. 50lb @28martin x150 i draw 28",goldtip 35/55 cut to 29in". 8 grains per inchweight tubes 250 grain tips. 694 grain total arrow weight. They fly great, I would definitely experiment with different tips in the 175-250 grain weight.Remember carbons are really stiff and you need to weight the front of them to get them to tune. You might even be a little to stiff with the 55/75 at 55lbs. Also the weight tubes didn't affect my flight.
scott