Yeah, this was mid-90s. As a recall, Eagle scout, and certain ranks in the sea cadets or civil air patrol could get you E3, college graduate in certain NECs would get you E4.
I signed up wanting a HM contract with field med school in the contract, at first they told me no. The army recruiter across the hall said that if I wanted medic guaranteed he would do it, and within the hour the Navy had it in the contract. The Navy recruiter said he couldn't remember when anyone came in specifically asking for a contract to be assigned to the Marines lol.