I was shooting 300gr. hard cast commercial FN's with 20gr. WW296. Long been rumored, Hodgdon's data now shows H110 and WW296 as the same powder. This load is not for a steady diet in the S&W, of course. I've now gone 'through' 2 M29's with too many of these types of loads. Now playing with .44 SPL brass and 200's with TB - loads of fun rapid tapping.