My biggest problem with the all copper bullets is copper build up in the rifling. I have not tried them with CFE powders however. Nosler partitions have never let me down.
Thank you for your response.
I heard this joke long ago.
A man applies for a job. The person reviewing his application reads that he says that he is never late for work, always does his best, gets along with everyone, pays attention, and on and on offers his merits.
The interview says "Wow, this is impressive, do you have any faults, ?
The applicant answers, "Well sometime I lie"
Game over
Nosler partitions are lead core.
For me with what I know now game over.
Now back to your fouling problem. Call Barnes and talk to their ballistician about it. Modern Barnes bullets have built in pressure relief grooves along the shank that catch copper shavings take them out which greatly reduces copper fouling and reduces chamber pressure.
Going back decades ago I was a licensed hunting guide operating in the Condor recovery zone in California, mostly I guided for boar hunting.
In 2008, by law all lead bullets were banned there. At first, I thought it was bullshit but the deeper I looked the more I saw the merit of it, but I was still pissed off. A lifetime of loads for lead core bullets down the drain.
Barnes bullets did have lots of problems in their beginning years.
Loading them was tricky, and I got lots of practice as I began loading them for my clients, to comply with the law.
Fouling and overpenetration and failing to open were early problems. Paying attention to their R and D developments is a must.
I have not had the slightest problem anymore. I use their copper solvent when cleaning. I use the bullets that match my velocity.
Boy do they kill. I left California long ago, have hunted over three states and my experience with modern Barnes bullets is the best performance i have ever had, and they are environmentally clean, which is very important to me.
THank you for your response