Normally there are two (90-shot) 900 aggregates. The second match begins at 11am even if the first match concludes early. You may shoot in either match or both matches. The 9am match must be shot with a .22 rimfire pistol. The 11am match may be shot with either a .22...
Rules, FAQs, and course of fire available at National Rifle League website. Arrival, check-in, and setup 9AM; match briefing at 9:45AM. Match fee is $7 for AAF&G members, $10 for non-members.