mm, redo your math. knock about 24 cents/loaded round off your cost. Your primers cost is actually about .026 cents per round.
Your loaded costs are under 50cents each. If you buy your components in bulk, you can cut the costs by as much as 20% more.
The 6.5x55 is an extremely good choice as an all around rifle. Good choice. With the 95grain V max or A max and a good accurate rifle, it will easily take coyotes cleanly and reliably, out past 400m as long as we do our part right. I use a powder, called H414 SL10. It is a ball powder that used to be sold by Higginson Powders. It is slightly slower than W760 and was one of the early powders Winchester loaded their commercial cartridges with. I won't go any further as it isn't available to the public anymore.
W760 or H414 with magnum primers are good combinations with just about any bullet weight for the 6.5x55. For the heavier bullets, over 140gr, H4831 is another good powder.