Re: Do you compensate for SPIN DRIFT???
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mouse07410</div><div class="ubbcode-body">Every decent ballistic program I've seen has a nice option "Compensate for Spin Drift". So for me it' a no-brainer, I just selected that option once, and never go back to it. Somebody else may leave that box unchecked.
Then on target - I'll believe the bullet, and - if the first shot misses (as it happens occasionally
) - correct accordingly, and record what happened.
I fail to see why this is a question or an issue. There are three ways of figuring your adjustment for the first shot:
<ul style="list-style-type: disc">[*] Actually shoot that load at that distance beforehand and record your dope. Then use that dope when shoot at that distance again. <span style="font-style: italic">Not a bad idea to keep and consult your logs.</span>[*] Use a ballistic calculator to conjecture what the adjustment should be. Depending on how you configured it, your calculator did or did not account for spin drift.[*] Use a ballistic calculator to print a range card for your load, or a book or whatever that lists the dope and take that printout with you. Spin drift may or may not be accommodated for, depending on how the original calculations were done.[/list]
In any case your first shot may or may not be spot-on. If it isn't - hopefully either you or your spotter (or both) observed the impact and figured the correction.
Nowhere in the above scenarios did accounting for the spin drift impose extra load on you. You actually don't need to think about it - think of the basics instead.</div></div>
That doesn't necessarily work out to be true based on the shooter...
I shoot targets at 1000 yards that are 8.75" wide... so adding the standard correction for SD, one has to know if today it was the wind or if it was SD... adding 1 MOA as most do, in some cases, they add in more, would result in me missing or thinking the wind call was correct when in fact the 1 MOA Adjustment caused the hit.
One would do well to do without it in cases of any wind over 1 MPH, because even though it might be 1 MPH at the shooter, it might be 3MPH at Max Ord, to which you would not know. It would also change if your wind is today from the Left and then tomorrow from the RIGHT.
So while many will feel the 1 MOA adjustment is a no brainer, tell that to the lefty who's trigger control is less than perfect.
In the caveated phrase, "All things being equal" as in the rifle is bolted to a fixture, I agree, add it in, but unfortunately when you add a person to the mix, "all things" are NEVER equal, if the math isn't working 100% for everyone you have to ask why ?
