The 4891 powder is to slow for a 87 grain bullet, so stuff as much as you can in that casing, and you will be fine, as far as they 87 gr ones even if you hornady data, it does not mean it will be your best load, so I would go with what Hogdon said. Don't over think it, make your own load data, there is no better data than hands on data.

Tanks Dean