I have a 26" factory barrel. I run the following:
brass trim 1.902
39.0 H380
55 gn Nos BT
OAL: 2.385 and use a Lee Factory Crimp Die.
100 yard (5 shot groups) average around .75", I have shot .4 with it, but I am usually not that good.
I just got a chronograph and we haven't had good enough weather to get out to check velocity yet.
edit: I use CCI BR primers