I do my squat routine in two phases, that is, with two dirrerent poundages. For the first wave I do:

6x16with80lbsashalfsquats  then:

5x12with80lbsasfullsquats  then:

5x12with 150lbsashalfsquats  then:

4x8with150lbsasfullsquats.    I expect myself to do this routine once every four days at least, usually.