GG how much are you putting on your patches?
I found that I had to use 10 - 12 drops on the patch to make it clean as fast as your photos show. But weather i fire 5 rounds or 10 rounds between cleaning I still do not get as much blue (I assume its copper fowling)
I have inclose a photo from yesterdays trip to the range using my 308 that Kirby worked on and a 300 win mag that I had a hart put on a while ago and neither seem to copper up that fast
I tried the no oiling thing but after setting for 2 months there is some very light and spotty surface rust. I think from now on I will not oil while shooting but will oil each time before putting back in case.
As you can see there is very little Blue coloring on any of the patches. I tryed to put them on a white piece of paper to better show what they look like
but it seems the place where i have hosting them seems to darken them a little.