I've loaded a 60 gr. Winchester jacketed hollow point meant for the .25-20 with 58 grs H4831 and 47 grs H414. Not MAX loads but lots of blow-up.
Did you mean reduced velocity? Just lower the powder charge from those given as a starting load.
Cast bullets? The Lyman #47 has a 90 gr cast bullet with 20 grs 2400, 22 grs IMR 4227, 24.5 grs IMR 4198, 30 grs 748. All for around 2100 fps.