You don't need an 80 grain bullet.....you can use ANY bullet. If you have 180 NBT....use them. Or Sierra, or Berger........whatever you have on hand in whatever weight you have. They should never be more than .2 grains off of their advertised weight. If in doubt, just measure 2 or 3, or grab a different box of bullets...what ever weight or brand, and weigh a couple of them. The objective here is to check your scale!!Darrin, I would check your scales if you are compressing powder. Do you have a bullet around 80 gr you could weigh?
Or are you seating the bullets deep?