It is so much faster to use a case tumbler to powder coat with, just dump 200-300 9mm's or 357's in a spare tumbler, throw in a couple table spoons full of your chosen powder & tumble them with the lid on for 20 minutes & then dump them into a collander & give it a few hard shakes to knock off any extra powder onto some old newspaper, etc & they are ready to go into the oven. I use a lot of Harbor Freight Red & have had no problems with it at all & I've probably done 20-25 thousand bullets in the last 2 1/2 yrs. I also use other colors but there's nothing wrong with HF Red.
After removing from the oven & cooling it's best to size right away, makes it much easier to size them. If you are having a tough time running them through your sizer (I use a Star & an RCBS) then just spray them with some Hornady One Shot Case Lube, let it dry for 2-3 minutes & they will pop right through. I've never had to paint twice.

Dick