Just to clarify what the others have said, an '03 rifle can be used in "Expansion Era"
side matches (rather akin to Wild Bunch shooting in SASS) but not in the Main Match events. For those the rifle and handgun must be of "Victorian" design/issue (1900 or earlier) as more exhaustively detailed here:
http://www.cascity.com/forumhall/index.php/topic,17271.0.htmlOne very notable exception to the general "1900 or earlier" Main Match rifle criterion relates to the Mauser, which must be a Model '96 or earlier, apparently because the Model '98, although developed in the 19th century, saw no extensive use before the 20th century, and was still being produced by the tens of thousands into the 1940's .... (Otherwise, GAF events would effectively be opened up to WWI- and WWII-vintage rifles, definitely out of sync with GAF's "Victorian Era" focus. Of course a Model '98 Mauser is more than acceptable in Expansion Era matches ....)