Copicut rifle Association has a range with 20 positions each at 200 and 300 yds. A smaller 100 yd range is incorporated in the 200 yd. Google them, they have a website with all the info you need.....
Who was it that was trying to get some public access to the Camp Edwards (Otis ANGB) ranges? I haven't heard anything in the last few years, and every time I've chased it down it's been pipe dreams, but the ranges at Devens got opened up again so I might just be way too cynical here.