I have a 270 win savage axis with a bushnell 3x9x40 bone collector scope on it . the issue I have is that at 100 yards I can group 2 bullets nearly touching all day as long as I only shoot two and let the gun sit for a while and shoot 2 more ,, every time I shoot the 3 shell without waitng it pulls way left ,,, way way left I have tried firing it a few separate occations and always the same deal two great shots ,,the third way left .. can anyone help?