hi, i got a strange situation... i have a big difference on drop value from one day to another at diff distances. 2850fps, 300smk, 49f, 40%humidity, 24.75 pressure. 2mph from 3 clock the same batch of reloading bullets, 0.5-0.75moa all day. all the shooting are done from one slope to another over a small valley. wind is blowing acros the valley, from 3 to 9 a clock. so here is... exball or jbm value are the same but real field value are off 407yrd - exbal 5.2moa, but field is 4moa 620yrd - exbal 10.75 but field is 10.5 at 8 degree cosine 975yrd - exbal 21.75 but field is 22.75 at 0 cosine i double cheked everything, and this is drive me nuts... any adviced, or help to solve this will be more then welcome.