A lot of lead, some WWs and very little tin for the SWC, The WC is mostly WWs with a little Lino. I'm guessing around 700 to 800fps for both loads in the Colt Cobra. How's that for the scientific method. I cast around 200+ for the HP and 700+ for the WC. Whichever one I decide on for the Colt the other I'll kick up to a +P+ in my M-60 .357.