PCing over Hi-tek coating?

[gunfan2]

Has anyone ever tried powder coating over hi-tek coating? The reason I ask I have some bullets that are powder coated and they shoot extremely well through my 45 acp. I bought some more exactly like them that was coated with the hi-tek coating and they don't shoot nearly as well. Just wondered if I could fix that by powder coating over the hi-tek coating?

[popper]

Try a single LLA or BLL coating. PC is no-no.

[dikman]

Try a couple and see, but I doubt if PC will stick to Hi-Tek (which is designed to be slippery).

[gunfan2]

Try a single LLA or BLL coating. PC is no-no.

What exactly is LLA and BLL?

[jcren]

Liquid tumble lubes. Mix of alox, carnuba and thinners. Bll (bills liquid lube) is just a mix of alox and Johnson's (or simular) liquid floor wax. Works well in its own right and is great for fixing failed lubes.

[gunfan2]

Ok I need some advice on this thing, I have measured the bullets powder coated they measure .453 the hi-tek bullets .453, both were loaded with the same powder and powder charge. The cast bullet is the same weight and design. The only difference is the coating, the powder coated bullets will average about 2.5 inches at 25 yards, the hi-tek will average about 5 inches at 25 yards. I am puzzled! Any input here to explain this would be appreciated!

[farmerjim]

I tried it and it did not work well. Poor coverage over Hi-Tek. Electrostatic gun might work.

[popper]

Answer would be the alloy. I assume you purchased both versions of coated? I've shot same load HiTek or PC in 40SW, no difference. My alloy. 2nd thought is it may be 1 coat HiTek for the 'low pressure' 45acp. You might try a lighter load. If nothing else works (assume no leading?) shoot them or recycle. Find another source.

[bangerjim]

PC will probably not adhere to HiTec. It is a lube and PC must bond with surfaces that are clean and grease/lube free. Method of application (BBDT or ESPC) won't make any difference. Just becuse PC powder sticks to a surface due to static, does not mean it will BOND to that surface in the baking process.

Someone on here has surely discoverd a solvent for HiTec stuff!!!! I have never touched the stuff so have no idea. MEK/acetone/laq thinners (mostly acetone-based anyway)/methanol/tolulene may be a solvent for the cured stuff. Clean all that gunk off by soaking and then rinsing in 50/50 SimpleGreen and VERY HOT water, then rinse in hot water.

[dikman]

The only way of removing Hi-Tek, once it's cured, is by melting the boolits (it floats to the surface as crud). No-one has come up with a solvent for the cured stuff. Not to say there isn't one, but if there is it's likely to be something pretty esoteric!

[gunfan2]

I managed to get the bullets to improve in the accuracy department. First I noticed that the bell of the mouth of the case was scrapping a little of the lead (hit-tek finish) off the bullet, enlarged the belling a little and stopped that. Next I was doing the crimp with a Lee carbide crimp die, it seemed to be making the bullet smaller in diameter. Don't know which helped the most, but came up with a 3.75 inch 10 shot group at 25 yards. A vast improvement over the 5-6 inch group I was getting. Thanks for all your input!

[RP]

I would bet money it was the lee die shrinking your bullet fit is key no matter what the lube material.

BTW thinks for the heads up it may save someone else from the dealing with the same kind of issue

[dikman]

That's good to know, I guess all is not lost yet.

[HI-TEK]

Ok I need some advice on this thing, I have measured the bullets powder coated they measure .453 the hi-tek bullets .453, both were loaded with the same powder and powder charge. The cast bullet is the same weight and design. The only difference is the coating, the powder coated bullets will average about 2.5 inches at 25 yards, the hi-tek will average about 5 inches at 25 yards. I am puzzled! Any input here to explain this would be appreciated!

That is easy to answer.
You have not advised your bore diameter.
The Hi-Tek is much more slippery, and as a result, you found out less accurate when sized at same diameter as the powder coating. The resultant pressure build up using Hi-Tek powder is much less.
You simply loose velocity and lose accuracy.
Powder coatings are not as slippery and cause more binding/resistance in the bore, and hence more pressure build up.
If you size the Hi-Tek a little larger, accuracy will return.
You simply cannot directly compare one product against another without taking into other physical requirements.