You can't stuff enough BP under the 250g bullet to 'blow it up' .... Simply not possible
. Just make sure there is no air between bullet and powder (slightly compressed) and you are good to go.
A clinger. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes improperly referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. Ok.... the .44Spec is growing on me ... but the .45 Colt is still king.