Pretty much every match-up poll shows a huge gender gap, but this is especially prevalent in the Hillary-Rand polls. Any particular reason for this? Rand is socially conservative, but not rabidly so (by the standards of his party).
You mention it yourself in your final line. Women are on average more socially conservative than men, at least when it comes to traditional family values and religion, while men are much more economically conservative than women. Rand is fairly liberal on social issues, while deeply conservative on economic issues, making him highly attractive to men, but not so much to women.