Mayor, I have a.38 barrell, 10" octagon. My experience with it is that no light load, i.e. 2.7 grs. Bullseye, will work very well. The 10" barrell with no cylinder gap just gives too much velocity for accuracy with wadcutters. My most accurate loads are of a +P type with jacketed bullets. I admit to not having tried 158 lead moderate loads, but wasn't constrained by an indoor range either. Just something to think about. ROB