Occasionally, a topic will pop up that is CAS/SASS "only" but that is the exception, not the norm. I'm a SASS shooter....and I'm currently transitioning from shooting smokeless to shooting BP. When my leather gets finished, I'll start shooting Frontiersman with my new '58 Remmies, so, I guess I'm good on "both counts."
T6 a/k/a Chickahominy Charlie