My question. does anyone have jacketed data for the 148gr.berrys dewc in .38sp using 700x?
This is another problem with these bullet makers turning out plated bullets with no load data. Who has ever heard of a jacketed wadcutter? Maybe they exist somewhere.
With other bullets you can kind of use jacketed data for starting loads, and kind of use cast data for upper loads of the plated bullets are soft. Good luck finding jacketed data for wadcutters. You can't even find data for harder cast DEWC. Its all based on swaged lead. All you can really do is take the top loads you can find for wadcutters, with the insight that the upper limits are usually there for performance purposes, and not because of pressure levels.
You'll also find that if you use lead data velocities, those will drop with a plated bullet over the same load, and pressures will increase.