Again, not advice but a thought process for evaluating load ideas. !. Do you have loads for that powder for a 146-150 gr jacketed bullet? If so, you can use the Berry's guide for using up to mid-range jacketed bullet data with plated bullets. Otherwise, basically any 158 gr load will be safe (pressure) for the lighter 148 gr bullet. 2. Based on the shape of a wadcutter, seating it at the cannelure will always take up more case volume than any other bullet shape, giving some additional margin. 3. The velocity of a plated bullet will usually be a bit faster than a jacketed bullet over the same powder charge, so you may need to be aware of the bullet manufacturer's maximum velocity.