Originally Posted by Fincuan

This is where gyro angle comes into play. Range doesn't matter when and only when the gyroangle is zero. Immediately when we move away from zero it starts to matter, the effect increasing together with the gyroangle. The effect is also more pronounced at short ranges. I'm sure a search will turn up some nice illustrations because this issue has been dealt with countless times on the SH3 and 4 forums.

Thus: When gyroangle != 0 you need to input range for accurate shooting.