No chrono results. I did buy 500 rounds of the Norma 158 fnfmj several months ago on sale, and tried some thru my 4 inch model 28 and 4 inch 586. Hit pretty close to the sights in both guns, seemed clean burning, and felt a little hotter than the typical 130 grain fmj stuff. I like the bullet profile in this load, and its a great deal when on sale for great quality range ammo.
Larry