The coating does replace the need to use a lube. Sizing is another issue but those Bullets were likely too small before the coating process. I run 36 grain of IMR4198 in my 16” 458 SOCOM and get 1600 FPS with a 405 bullet so you are probably pushing 1900-2000 I would guess. I’d try a hand ful and add layers of coating to get larger diameters to find what works. You might still be too hot for a CB alloy bullet. If so, slow it down some. Keep us posted.I just got the hi-tek polymer coating and began to read the directions. This looks like a far more detailed operation that I was hoping. As I read the instructions, it stressed how clean the lead bullets need to be. So I first melted the wax ring off with a heat gun and then soaked them in acetone, wiping them off and then soaking them again to get rid of the residue film that might coat them. But then I thought of trying the powder coat again. Perhaps my bullets were just not clean enough. I followed your instructions and put some air soft bb's in it. The powder seemed to take. At least better than before. My first attempts, it did not take at all whatsoever. I am using white. It at least turned the bullets gray. So I cooked them and then ran them through the tumbler again. The second coat did not seem to make them much whiter - if any at all. But anyway, they did take some coating. Now, I am wondering about lubricating them. I don't have a lubra-sizer and cannot find one. So, will this coating be enough to keep it from leading the barrel or do I need to coat the bullets? Should I find a way to fill the wax ring or just coat them with allox? I don't know how fast these 405 gr. bullets are going yet. I am pushing these with 42.5 grains of IMR 4198. They are going faster than cowboy loads. BTW, I just found on the label of these bullets a "CB" in the description. Evidently they are for cowboy loads. I am guessing they are too soft for the speed I want to push them. I am hoping this coating will alleviate this issue. I cannot find bullets anywhere.