Thanks Dopler..

I shoot to 60 and the guys at the range gave me the tip that equally spacing your pins will work. But as i understand it the gap increase slightly as the range increases. for example the gap between 20 and 30 is slightly smaller than the gap between 50 and 60.. Just wondering if there is a way to calculate the difference in the gaps, it might be small but I am curious how small..

Cheers.