My apologies if this has been already covered but I am looking for a little guidance on Hi-Tek coating.
Earlier this year I bought some Hi-Tek powder from Bayou Bullets. This is the powder one that only requires acetone and baking.
Memorial day weekend was the first chance I had to try out the stuff. I was really impressed with how easy it was and the boolits look really cool. I followed the directions to the best of my ability and applied two coats to some 38cal 147gr hollow points (plain base) from a MiHec mold. I then sized them down to 358dia (the same diameter I size my normal lubed boolits). After sizing I re-coated a third time for good measure. I loaded them like I have thousands of standard cast and lubed boolits into some 357 brass with 14.0gr of 2400. I test fired them in a proven cast gun (my old S&W model 28 with a 4" barrel). I got really horrible leading in the last 2" of barrel. Do I need more coats? Dial back the velocity? I didn't chronograph these particular loads but standard cast boolits clock in at around 1300fps from a 4" barrel.
Based off my experience with cast boolits I would say the lube or rather the coating failed, thus resulting in leading in the last portion of the barrel. There was no leading in the chambers, throat or first inch or so of barrel.
Tips, pointers, or a link to this topic if it has already been discussed would be greatly appreciated.