hi-performancebulletcoatings.com
319 grains ~= 20 grams too much coating for 75ml of acetone
75 124g bullets is only about 1.3lbs so you should use no more than 2.5ml first coat
Shake only until the the coating flashes (I shake in a closed container for 30 seconds and then open for another 30) - if you shake too long you risk the coatings sticking together and pulling off while still sticky.
365° is just barely hot enough to cure - this might work in a convection oven with good air flow but you'll likely find you need to be closer to 200° C to get reliable cure (but dark colors)
If you are close to Taunton, stop by and we can cook a batch or two and get you going.