Not to worry.
you SHOULD have been to not to use rifle powder in pistol LOADS and not to use pitol powder in rifle LOADS.
I use pistol powder in cast bullet rifle shooting often.
H110 is actually both a pistol and rifle powder.
And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him. And power was given unto them over the fourth part of the earth, to kill with sword, and with hunger, and with death, and with the beasts of the earth.