I checked it with a magnet and it must be a brass frame..I will probably sell it since it is unfired and see if I can find one that has been fired..Maby one like this one but in blue or an 1860 army..Thanks guys for all the help..
Cabelas sells a number of steel/case hardened frame 1851 Navy pistols. The one you bought doesn't specify, however. You might call Cabelas and try to pin it down before loading up with over 25 grains. Pietta might also have the info on their site.