I've been using Mizuno JPX 825 Pro irons with True Temper Dynalite Gold XP S300 shafts for the past 6-7 years and while dispersion has been pretty good, the shafts at 117 grams feel heavy for me, resulting in inconsistency on my long irons and lack of feel on my short irons. I've tried Nippon NS Pro 950GH (stiff) and NS Pro 950GH Neo (SR and R) on my 7i and I really like the lighter weight, more control and better feedback on hits/mishits, but I'm getting ~10 yard fade/slice on most shots and I have to really try to turn it over, resulting in inconsistencies. I'm not tall/strong and hit about 145y with my 7i, also not a smooth swinger, so maybe the NS Pro isn't a good fit for me.
Any idea why I'm getting these fades/slices and do you have any shaft recommendations for me? Thanks!