All 93's are rimfire. The model 93 is a magnum (17 HMR and 22 WMR) rimfires. Heads[ace is not adjustable on any 93. Someone here might be able to point you to a link where some have swapped barrels, and they indicate how they have set the headspace in doing so, but the rimfires, ant not as user friendly as the centerfires are, in that respect.
If you are not capable of doing that type of work I would contact Savage and possibly send it back. That would explain why it was sold as a low round count firearm.
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