Where did you find this reference to Craigerme Farm?
Actually, I am not sure that finding Craigerme or Craigerne will give you the answer to your question, which is, presumably, the identity of Peter McCallum. If he was a farm worker, he might have been a hired hand who signed on for a six-month term, and then moved on to another farm for the next term. If he only moved a short distance every six months he could be on the other side of the county by the time of the 1871 census.
However there is a 25-year-old Peter McCallum, inn keeper, born Monzie, in Red Lion Inn, Kippen, in the 1871 census with wife Isabella, stepson James and son Peter. This is Peter McCallum and Isabella Scobbie, who were married in Glasgow in 1870. He is the right age and in the right area to be the father of your grandfather, so it might be worth investigating him.
Peter McCallum, aged 48, mother's maiden surname Paton, died in Kippen in 1893. Peter McCallum, son of James McCallum and Catherine Paton, was baptised in Monzie on 15 April 1846.
If I were you I would look at the marriage of Peter McCallum and Isabella Scobbie or McKillop and see what it says about Peter's occupation and residence.
BTW it's Buchlyvie with an h, not a k.