I've never loaded steel but I have ton's of load data for it in my shotshell loading resources. The hull you use is not specific to steel, but rather the wad and any other components necessary for a given recipe. You can load steel in any hull that will accomodate the components, and those loads are as well listed with those hulls.
Using the Sportsman Steel in place of the Nitro Mag. will go together just fine with the right wad and necessary 1/8" spacer's, usually one on top of the shot, and one under the shot. But powder is as much specific in the working load as is the hull, wad and spacers. Make sure you don't delete any components though. Loading steel is very specific to the components necessary, other wise bad things can happen, especially consideirng steel loads typically operate at significantly higher pressures than lead, therefore any unintended pressures can ruin your day!
But as I was saying, the hulls listed are primarily standard hulls such as STS, Federal Gold Medal, Rem. plastic SP's, Rem. Nitro mag., Fed. High Power, and even Federal's that have the integeral paper base wad are used for loading steel.
To list the load option's would be pointless because I don't know what powder you are using and what load you are seeking, be it 7/8 oz. , 1 1/8 oz. and so on.
Log onto Alliant's and Hogdon's web site, they have a good bunch of data for shotshell.
