500WE,the Hornady 250X.T.P. is one of those bullets that is too soft for full power .454 Casull loads.The Hornady techs told me that it should not be pushed passed 1600 f.p.s. as it will erode forcing cones in revolvers.The reason I mention it is many shooters use this bullet and don't know about the 1600f.p.s.limit.I use this bullet in my .454 at 1520 f.p.s. and it does great on whitetails and very accurate out at 150 yards.