I've been powder coating for several years, pistol calibers only. Also asbb, not spray gun. I tried hi-tek a month or so ago. Process is easier, but it takes just as long to get similar results due to multiple coats.
One advantage I do see in hi tek is the film thickness uniformity. As the bullet seater interacts with the sides of the bullet, the oal is a function of coating thickness. Large variations in thickness will give larger variations in oal. Hi tek is significantly more uniform than powder in my experience.
My 2 cents.
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