Re: Why zero at 100 yards?
It depends on the caliber, but I zero at the longest even hundred yards that will still let me take a point blank, no hold over or under shot all the way back to the muzzle. Most of the time that is 2 or 300.
Also, I ALWAYS zero windage at a longer distance because small errors in your zero may not show up at 100 and would be more obvious at 3 to 500. To do this though you need a near zero wind day to be sure you are not accidentally including some wind value in your zero.
"My greatest fear is that after my demise my wife will sell my guns for the price I told her I paid for them"
-don't know where it came from...but true