That bright orange is too close to the same brightness as a white background for me, despite the color contrast. The next time I run off some copies of mine, I'll have to try to crank out some blue ones.
I also like the various splatter targets for practice and the pasters they provide make good targets themselves. The self-adhesive ones work great when the backer board is getting too shot up to hold staples.
The only time I can't clearly see the orange dot: