Michael, every time a right handed shooter tells me they are hitting consistently left, I always suggest checking your back
Pressure. Short draw, not pushing thru are caused from not
Getting good back pressure. If a person has a good anchor,
Grip,stance, all of the basics, but still can't shoot consistent,
It's back pressure.
My hunting partner and I shoot together a lot, if one of us starts shooting bad, the other says remember the two rules,
#1, get back pressure, #2, get more back pressure. It really will
Solve lots of shooting problems.
RW