I don't remember the name of the lube I used. It is a BP lube. It's soft like toothpaste and I applied it by setting the bullet half way over the lube grove, then packed it in like pushing grease into some wheel bearings. I didn't size them. I have a Saeco mold and it drops bullets vary close to spot on ever time. Give or take a half thousandth. I am a little bumbed that Lymen did away with the bullet sizer on the 310 tool. The old one just hade a hole on one side of the grip and a pin on the other to push it through. It's such a simple design. Why they did away with it, I'll never know. Apart from not having a sizer, it's a great tool to have.