New member so I'm late, BUT to finally answer your question (after reading all comments):
I PC ALL my slugs to avoid lead fouling in the barrel.
Even if the slugs won't touch it, why risk it.
Here's why (I just posted this on the r/castboolits on Reddit [
https://www.reddit.com/r/castboolits...ic_powders/]):
No, or extremely little, lead fouling in gas operated shotguns.
Eliminates lead exposure when reloading.
No need for bullet lubricant.
Little to no lead and/or lubricant smoke when shooting.
You can use clear hulls to "color code" your different shot sizes and slugs.
It can be aesthetically pleasing or ASMR
In that link, you can see some 00 buck that I PC'd with 6 different colors from Prismatic Powders (owned by the same company that owns Cerakote).
Including some that glow-in-the-dark.
I also did some DGS slugs from BPI.
Due to the Cerakote "sister" company, PP has amazing powders and a vast selection of colors. Unlike other companies.
It takes 10 minutes to PC (with my method) then 10 minutes in the oven.
Another 10 minutes after removing from the oven (water or air cooled), you can start loading hulls.