I've just started using the Vortex BDC on a 98.
With a 25yd zero the marks fall on 34, 45 and 54.
With midway between 34 & 45 being 40yd, (call me sherlock)
Only just put it on so still perfecting the exact poi but it seems to work well.
Smells like Spring is coming....
Nope, missed it.