My MOAB is 60# and i've lowered to about 51-this way i feel much better and shoot easier and more accurate. I will increase the poundage with the practice, but as a new archer i don't feel good with the heavier.You can now lower your bow and after some time you can return to the 70# (and you won't lose so much speed).
2008 Martin MOAB - 45-60#, set at about 51-53# / 55#" Perfect Line" compound/ 55# Mongol horsebow/ 45# "Perfect Line" takedown recurve/ 45# Bearpaw Grizzly hunter recurve/ 55# Samick Longbow Cheetah ... and several homemade bows