Howdy Shotgunners especially black powder shooters,
This past weekend I was experimenting with my recalcitrant '87. I thought roll crimped shells would eject more reliably than star crimped (they did). The kicker was that a buddy gave me 4 of his roll crimped BP loads. I needed at least 6 for the stage. I shot the BP loads first and finished with smokeless loads.
The next day when i went to clean the bore, I found a weird hard grey crust in the bore. It took a stainless tornado brush and copious amounts of Windex to scrape off. After the bore looked bright, oiled patches.
Is mixing black and smokeless a no-no? Has anyone else seen this happen? I plan on learning how to roll crimp some smokeless loads to make that damned '87 work better.
Rev. Chase