I have loaded the 300 gr XTP in my 44 Mag Ruger Super Redhawk with 23.5 gr of Win 296....in every situation I've had jacket & core seperation. According to Hornady I'm loading it with 4.5 gr's of too much powder. This is a custom load only for the Redhawk and Super Redhawk. The Swift and Speer bullets would be my choice.