I am having a similar issue with a 1911 I recently bought.. When shooting right handed I hit pretty consistently 4" right at 7 yds. When I correct for the POA/POI difference my shots are all over.. Left handed is even worse, with no consistency what so ever.. When I sand bag it I can one hole it on the X.. I get out my PT92 and can shoot 3" groups left or right at 7 yds. I WILL LEARN HOW TO SHOOT MY 1911!!!!!!!