Please keep us informed. I am not aware of how the burned graphite from the neck could affect the bore, but that is a good question. Are there any material engineers or chemical engineers that could provide an opinion?I recently shared with fellow F Class friend using Mica to dry lube case necks after cleaning necks with bronze brush. He used small container with #9 shot. He does have a K & M strain gauge to test this. His before readings was 40-50 and then with Mica down to 10-20. He did not chronograph but it was neat to hear of the 66% reduction. He will shoot a match coming up. This is for his Lupua 6.5 Creedmoor brass.