Been playing around with my .357Max shooting the RD359190 boolit with GC and getting phenominal accuracy, 9/16 by 1/4 at 50. This with 28gr A1680. What I'm wondering is: my mold is 3GC and 3PB and want to try some of the PB. Will the A1680 likely be a good starter powder (probably lighter loads) or might it be better to try 4227 or maybe 2400? I'm sizing .359 for a .358 bore so getting a good seal. Any thoughts? Goatwhiskers