Yes the Black Diamond XR does suffer blow back from the ignition breech area with or without the 209 ignition. I wrap my scope with plastic electric tape and then wipe it off when I clean the rifle. Every so often I change the tape. All muzzleloaders get some blow back. It is the nature of the beast. If the extra time it takes to clean the rifle is a bother then you need to get a break open. Maybe they do not fowl up so bad.