They use them at bigger matches where you have enough people in each class to warrant having a class.. Our local match usually has about 6-10 F-Open shooters and we all shoot in one class instead of F-Open (HM) then F-Open (M) and so on... Maybe this link can help you... Page 4 I think...
https://rulebooks.nra.org/documents/...R/hpr-book.pdf
Bookmarks