I have a Sig Sauer 2400 ballistic rangefinder. I have created a profile for a 28N inputting all the parameters. Thought I was doing good so went out and ranged a few things at various distances and wrote down the distances and MOA holdover. Went back and compared the outputs from online calculators at Berger (Applied Ballistics) and JBM. The Berger and JBM were very near equal but the rangefinder is about 3 moa off at 350 yards and 4moa off at 550 yards etc. Anybody have an idea where I'm going wrong? Environmental conditions are the same. Thank you