Re: Used the wrong COAL
Your reloads will actually produce a bit lower peak pressure by giving the bullets a bit more running start before hitting the lands. Large capacity rifle cartridges DO NOT respond to seating depth changes the same as small, high intensity handgun rounds that use much faster burning powder.
There is no "wrong" OAL, if you properly develop your rifle loads at any seating you wish all will be well. And seating a bit deeper in rifles NEVER raises pressure like seating further out will do.