I could be wrong but i belive you will find fullbore bullets in 22 and 308 caliber bullets refer to target shooting where the weight of the bullet is restricted as in international palma matches where the 308 is restricted to less than a 156 grain bullet hence Bergers 155.5 grain bullet. Not for sure about the restrictions on the 22 caliber bullets but would assume using the same formula the 80.5 grain would be to stay under a less than 81 grain restriction.