Take it from someone who works at Kohl's....I've seen some pretty large limits on opening accounts.
$300 is pretty low (sorry). On a good note, if you use it at least monthly, you should begin to receive cli's at statement #6. I've never seen anything lower than $300. Just do NOT be late. Since Chase took over....
Last week I opened a charge for an 18 year old with no credit....bam $900 limit.