Re: Dumb NF question
To each their own, but most military engagements and humane hunting situations take place within 200 yards. I know others may argue otherwise, and brag about taking longer shots, but this is a general statement and there are expections.
The advantage in zeroing at 200 yards is that within that distance you can aim your crosshairs on the target and still be in the kill zone...you may not have enough time to adjust your scope or click your turrets.
For a 308 win, depending on the load from a 155gr to 200gr, the drop at 100 yards is about 1.5 to 2 inches. For silhouette or steel targets, that is close enough. For target shooting and some competitions, that is not very accurate, so that is why I advocate zeroing (setting your "0" on turret) at 200 yards and setting your zero-stop at 100 yards.
Every additional factor can be confusing, but with practice and assuming you use the same load each time, it is very easy...just turn "down" until the turret stops for 100 yards, and turn "up" to "0" for 200 yards. Just my own preference, for my applications...your may be different.
If you are convinced you will be using the same load all the time, you can even mark your turret with a silver sharpie at 300 yards, 400 yards. But I would only do this if you don't switch loads or scopes between rifles, and are absolutely sure. For me, this is a lot faster and a lot less confusing then looking on a dope card. When you are nervous, it is easy to look on the wrong line or even lose your dope card. That is also why I like scope cap stickers dope cards (scope dope), but that is another topic.
Even with the heaviest bullet you can find in most calibers, the difference in drop up to 1000yards from zeroing at 100yards vs. 200yards won't likely be beyond your NXS scope adjustment capability of 100 MOA. So choose whichever works for you, there isn't an absolutely "correct way" of doing this, whichever is your preference.