There used to be a 2700 three gun Bullseye match once a month at the Peconic River Sportsman's Club out in Calverton. There are ranges, I have learned recently, near Gabreski Airport in Westhampton. Don't know about competitions.
Pete
The NRA Open Conventional Pistol Sectional will be held at the Roslyn Rifle and Revolver Club on Feb. 28, Mar.1, 7, 8.
See www.roslynclub.com
Applications and contact info at that website.
The club and the indoor range is located in Nassau. They have a private rifle range in Suffolk.
Pete