lefteye42 "Need load data for 38 Spl, to be fired in Winchester 94, chambered for 357 Magnum."
It is not clear to me if the OP wants .38 Spl load data or .357 Mag level load data for a 94 using .38 Spl cases.
I use factory ammo and handload for my .357 Ruger Security Six (4" barrel) and .357 Rossi LSI Puma (20" barrel);
From the rifle, factory .357 Mag that would splat on my swinger target when fired from the revolver, when fired from the carbine they crater the face and show a bulge on the back. .38 Spl does not show me a dramatic increase in velocity like that, but there is some increase.
I know the temptation to use my huge cache of .38 Spl brass for more powerful loads for my .357 revolver and carbine. I have fewer .38 Spl +P and .357 Mag brass. I have learned to use brass marked ".38 Spl" for mild .38 Spl loads only; I have J frame size .38s I do not want to stretch. I reserve brass marked ".38 Spl P+" and ".357 Mag" for loads beyond standard .38 Spl and I label the boxes for all the handloads with bullet, powder, charge, and primer info. I plan on using .357 Mag brass only for any rifle load development.