That drawing does not actually show the dimensions between the outer rows of pins, but a dimensioning tool reports that it is 19.26mm, which is about 0.758 in. So that really is not on the 0.1in grid. That does not match my 0.73 in either though. I got that using the ruler tool in Fritzing. Maybe I miss-used/miss-read that, but it needs confirming. You should print out a sketch with the part at 1:1, and verify that the holes line up accurately with a physical part.