HMM, I don't own a PCR , I do own a P-01.
shouldn't be much difference in those as far as shooting.
out to about 18-20 yards my P-01 hangs right in there with my SP-01 and 97 BD.
now it don't shoot with the Shadow-2 but I don't expect it to.
I would guess its user error and getting use to the weapon, typically left shots are the right handers fault.