Re: Ballistic AE .. what is it missing that you want..
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Ring</div><div class="ubbcode-body">"generally" speaking, u should reaLY true be messing with the BC, "normally", just tweaking the MV is needed, because the MV you read from your crono is wrong... IE: its not true MV since its measured X distance from the end of the bbl. and built in errors in the crono, and user errors in its setup...
i bet if u use the crono data from that magnetic crono that actually read at the muzzle, and your scope was on, i bet you wouldnt need to true at all...
but thats just a guess on my part/...</div></div>
That is simply not true, BC are generally over-estimated and it depends on how far you shoot, adjusting the BC helps adjust the curve. Not big but some.
Sometimes just adjusting one changes both short and long ranges, where changing the other helps keep in line the correct short range while changing the long range.
At Gunsite this week, we shot to 2000m and truing "both" was necessary... we spent more than one day "truing" and I had to adjust both, 50fps on the MV and .01 on the other.
For the 285gr Hornady I used .71 and 2800 even though we read 2850 so look up the BC and see what Hornady recommends. The difference between talking about it and doing it.
PS> why do you think they "band" BCs to adjust the number as MV changes.. because one number is not always correct. Great example is the 308 SMK which is listed as .505 and is actually used as .496... that right tells you something. you always have better results if you can band the BC to adjust for the slowing MV