Re: 338 Lapua ballistic charts
And excellent programs they are, too - accurate and easy to use.
If you zero at shorter ranges, the change from the zero conditions to the shooting conditions won't have much effect.
<span style="font-style: italic">However</span>, the change in muzzle velocity with temperature at longer distances <span style="text-decoration: underline">will</span>, as you know, have a significant effect. And many shooters neglect to compensate for that change. Actually, not many shooters even have a good idea what that change is for their load.