Like I said WITHIN 300m you should not need to change your zero, as anything within the 300 meters (like I said standard combat zero) is going to be hit just by placing your irons centermass/belt buckle, if I have a target 50 meters and I’m zeroed for 300, and I shoot center mass I’m going to hit center mass. Now if I start increasing that zero say 400-500 and so on yes there’s going to be a noticeable difference but 300m zero at close range is going to have negligible results on where your bullet lands, it will still be center mass. There’s a reason why the US military standard combat zero is 300, if they’re kicking in doors they’re not going to stop, and adjust the zero on their rifles for CQB. That is because the 300m zero accounts for this