If this is the first time you are looking for the next job after working for a few months in the current one, it is acceptable and no harm trying. Been there before and done with it. However it also depend on the hr filtering the applications and hiring manager of the agency you are applying to. Nowadays govt agencies can afford to be more choosy than before since they have limited or freeze headcount and knowing that job seekers are more desperate to land a job in current economical climate.