He is shooting a 300 RUM with 180 SST's at 3485 fps. I wanted to find out what his zero would be because we are going shooting in the morning and I want to play with it a bit.

I looked on the Hornady site and according to their calculator this round would drop 2.8 inches at 225 yards if it were sighted in for a 100.

So at 3 inches would the zero be 225?