I used a load of W-231 from an old Winchester reloading handout, which load is no longer listed in any current manuals, for some super hard 230 gr cast bullets I bought at a gun show. They shot EXCELLENTLY, would go through a rail road tie length-wise and velocity was "HOLY SHEET!"16lb 5 inch is standard it should run ! Berrys bullets are copper coated and not jacketed they should be loaded just above lead bullet loads to start then work up . looking over some old load data lookes like 5.5- 5.7 might be more of what you want. I always work to get good groups low recoil and still run reliably.