Powder Coating and Charge Weight

[oneadam12]

Guys who have gone from lubricated cast lead to powder coated lead in .45 ACP, how much did your loads change (if any)?

 

[jmichelin84]

I was just thinking about the same thing with black powder round balls, wondering if I have to charge up or charge down on it, but I was also thinking the same lines as you were thinking of 45 ACP and my 30 30, I believe it is the same charge or minus a few grains

 

[yomomma]

I think the powder coated have a little lower friction coefficient, thus you load should/could drop a little

 

[Auggie Doggie]

When I compared my 147gr 9mm bullets, the difference in velociy between the traditional lubed bullets and PC bullets was only about 12fps with the same powder charge. I got similar results with 130gr. .38 loads as well.

Auggie D.

 

[270 totheend]

When I compared my 147gr 9mm bullets, the difference in velociy between the traditional lubed bullets and PC bullets was only about 12fps with the same powder charge. I got similar results with 130gr. .38 loads as well.

Auggie D.

Just curious was that plus or minus?

 

[Auggie Doggie]

PC was faster.

Auggie D.

 

[hatman1793]

Powder coating cast bullets makes the driving bands or bearing surfaces entirely slick. Slick means less friction.
Less friction in the barrel means a bit more velocity, but i would not commensurately reduce the load.