I was asked in a PM to take photos of how I do the turn down on my shooting socks. As I can't get the pics onto a PM message I am going to post them there. Hope they help anyone that couldn't fully understand my explanation above.
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Pic 1. shows the sock laid out with the seam for the patterned top at line #1.
Pic 2. shows that I have pulled that seam down over the material of the leg of the sock about 2 1/2" to line 2
Pic 3. shows that I have now folded the top over as you would normally do.
Pic 4. is looking up under the turn down. Note that there are actually 3 layers of material now giving a nice fullness to the turn down.