My thoughts on the subject are that if your b/c gap is tad bigger than you would like then just stick to shooting larger or higher weight bullets. I pretty much stick to 158 grain and 146 grain in WC. I never shoot 125 grain bullets in any of my guns as I feel they are not long enough to spread the b/c gap and especially on model 19's create too much forcing cone wear. The heavier weights will keep the forcing cone wear to a minimum. Of course if self defense is the plan then carrying it with 125 grain is not a problem as shooting off only a few in the guns lifetime is going to make no difference at all. I spoke with Hodgdon about using magnum powders and their thoughts agree with this on shooting heavy mag loads. good luck