Stop by your local auto parts store and pick up a small tube of pure white lithium grease. You can apply it to the bullets using your fingertips, probably do over 150 per hour while watching the evening news. Nothing provides better performance with cast bullets up to 2000-plus FPS. Only drawback is that it won't work in lubricator-sizer machines because of its thin consistency, otherwise lithium grease would have become the standard 50 years ago.
For small batches, like you have (500 pistol bullets), nothing is better or easier. Shouldn't cost more than $4 or $5, and you'll have enough left over for another 10,000 or more.
After applying let the bullets sit on newspaper or paper towels to air dry for a day or so, then they can be handled without mess or fuss or muss. I use lithium grease all the time for lubing bullets intended for my antique rifles, for which there are no common lube-sizer dies, etc. Couple of hundred at a time takes very little effort, and the lubrication is excellent.