According to powerbelts web site at 25 yrds you should be .65 inchs high which should give you a zero at 150 yrds and 2.88 inches high at 100.Check thier web site they do have a ballistics chart.Just remember also that if your scope is set at 1/4 moa at 100yrds it should drop to 1/16th at 25.Also try a bullet with a higher BC you will get better knock down power.My setup T/c encore 26in barrel,275 PB aerotip 100 gr pyro.Knocked down a spike last night at 190 yrds.JMO.Good luck