Accuracy can depend on a lot of things mechanical. For instance the dimensions of your chamber vs. your ammunition. Also short light bullets can have a bit more space in the throat to the lands than longer heavier bullets. Not all bullets are created equal. I often Use PMC .223, 55 gr and the spread at a hundred meters is about four or five inches. Granted it's usually a little gusty where I shoot. If using match grade ammo it gets considerably tighter.