A Minute of angle is a 60th of a degree. A 1/4 MOA is a 1/4 MOA regardles of the range. A 1/4 MOA represents roughly a 1/4'' at 100 yrds so 4 clicks up, for example, will shift the next group up by 1 inch at 100 yrds or 2'' at 200 yrds. This is the theory, in reality, the best thing is to use it as a guide then check for yourself on the range. This is easier to do at longer range as, if you are looking for a 1 inch change of MPI but shooting 1-2'' groups it all becomes a bit pointless. As for your Swarovski, just consider 1 click to represent 1/3 MOA and work from there. JC