Filling Selections With Selections

I am trying to fill a selection in one picture with a selection from another picture. I am having problems scaling the selection to fit exactly. i still have an outline from the other (previous) selection.

I opened both images up side by side, Adjusted the view on both to 33%, made my first selection, hit control + c, made my selection on the other picture (Exact same shape), hit control + v + shift, then edit>transform>scale, then shift+drag.

Can't get it to line up. I also tried layering the two images then reducing the opacity of just the selection, but photoshop reduces the opacity of the entire layer instead of just the selection, which doesnt help.

Much props to anyone who can help me out.

Hello,
If your images have exactly the same dimensions you can just load selection from one document to another one:

- Choose the image with active selection
- Pull down "Select > Save Selection" > "OK"
- Choose the second document
- Pull down "Select > Load Selection"
- In the "Document" field, select the first document's name
- OK

You don't even have to go through all that trouble of saving your selection in one image ... and loading it in the other. It'll cost you some seconds more, and a bigger filesize. Because all selections are saves as an extra channel.

If your 2 images have the same pixel dimensions you can drag the selection from the first image and press and hold SHIFT when releasing the mouse button on the second image. This way you have some sort of "place selection in place"-mode.
And so we end up with the exact same selection, in the exact same place.

Good luck