I'm another who just makes an X on a paper plate with a felt pen.

For up close, I use a sharpie, and make a fine X (rimfire at 30 yards)

If shooting farther that 100 yards, just use a bigger felt pen.
I've got one that's 1/2" wide. Works great for distance, and handguns.

Been doing this for over 20 years.


Virgil B.