For anyone considering archery curtains as a short range backstop

[Rutty]

Thanks for posting, Dave. Could prove very useful to many.

As mentioned above, I seem to remember a couple of indoor rimfire ranges I used to visit years ago employing heavy duty free-hanging rubber sheeting.

What you are referring to is Ballistic Rubber Sheet. It's purpose is to stop splashback from the backstop and trap dust in the catcher. Don't even think about using it for airguns, even FAC power levels. Sub 12 ft\lb bounce off it and return towards the firing point at high speed. The issue with FAC power levels is that although it may penetrate the rubber it tends to tear it and can result in holes appearing quite quickly.

If you refer to para 5.1.2.1 of the NGB Guidance on the Design, Construction and Maintenance of Target Shooting Ranges:

The principal dangers from air rifles and air pistols are pellets bouncing back from striking a hard or reflective surface, such as the rubber anti-splash curtain of an indoor rimfire range

Rutty