I am getting some leading in Glock and Cz 9mm barrels using Hi-tek. Bullet is Lee 356 120 tc according to my Cabine Tree hardness tester they are 16 Bin. If I quench out of the oven they are 20 Bin both hardness lead the barrels. I am doing 3 coats of Hi-Tec.. 3.8 pounds of bullets to 4 ml of Hi-Tec for each coat baked for 12 min at 390 degrees. bullets pass smash and wipe test.
I size the bullets after the first bake. they are sized to .356 I realize that if I size to .358 they won't lead but then they won't work in my shock bottle case gauge and they are kinda big for the Cz. I shoot pistol competitions and the case gauge is a must for me. There are plenty of companies that sell Hi-Tec coated bullets sized to .356 maybe they all lead I've never tried them but have seen lots of them at matches.
I load them to a 1.10 Oal with 4.2 grains of Win 231. I use a Mr bullet feeder 9mm expander and a taper crimp to just remove the flare. Pulled bullets are not scraped and are not being swaged down by the brass.
So that's my process I usually cast and coat in 3000 bullet batches and Hi-Tec is a awesome coating and works very well with big batches of bullets. The leading isn't that bad but if I shoot 200 bullets there is lead in my barrel. My question is are you guys really getting zero leading with Hi-Tec ? Do you see any problems with my process? I have spent a lot of time lurking on this forum to get to this point thanks for all your help.