I'm another longtime Winchester 231 loader...have been using 6.6 grains behind a 240 cast or swaged LSWC as a field load and target load. I get right at 800 fps in my 29-2, 6 inch. Oddly, it goes 850 fps in my 4 inch 629-4. My 629 is a "fast gun" as it consistently outpaces my 29 by 50+ fps. Both have tight b/c gaps, I think the newer gun has tighter overall dimensions. Anyway, on a good day it shoots one-holers out of either!