So I've been reloading for a year or so now, and I've shot plenty of cast boolits, but up to this point I've purchased all of my boolits online rather than casting them myself as I didn't previously have a cheap source of lead. That has since changed and I'd like to try my hand at powder coating. I've been told before that powder coating has a small amount of rebound; for example, if it has been sized to .356", it will end up at .357" diameter. I would firstly like to know if there is any truth to that claim. Secondly, I've been told that black powder coat has abrasives in it and is not good for your gun, yet I've seen plenty of pictures of black PC bullets. Is there any truth to that claim? Thirdly, I would like to start casting for my 30-06 and have been told before that it is better to use boolits that are oversized by .002-.003" rather than the typical .001" for faster rifle calibers; basically I want to know whether I should get a .309", .310", or .311" sizer as i don't really have the money to throw around to get multiple sizers to see what works best. I did slug the bore and it is .3075"