Michael, if you have the RMC hulls, take a look at the Advantages Manual. There's a 2 3/4", 5/8 oz. load for Fiocchi, folded crimp, which is 7800 psi. It will fit in the 2.5" brass. Pressure will most likely be lower in the brass hulls which have more volume (no molded base) and no folded crimp. RMC is still taking orders but will either sell out or fold their tent and quit after the new year. Gil