State Line Gun Shop in Mason, NH has all your needs for BP.
From John Fitch HW turn onto MA-31 (Head towards Ashby)
Turn RIGHT onto GREENVILLE RD/MA-119/MA-31. Continue to follow MA-31 (Crossing into NEW HAMPSHIRE).
State Line Gun Shop will be on your left 1.1 miles, there will be flag that is red, white, and blue with the lettering GUNS if the shop is open. Turn into drive and follow road up past the house to the shop.
HOURS
Monday: 10am - 7pm
Tuesday: 10am - 7pm
Wednesday: 10am - 7pm
Thursday: 10am - 7pm
Friday: 10am - 7pm
Saturday: 9am - 6pm
Sunday: 12pm - 4pm
Please make sure that you are properly licensed in Massachusetts, possession of bullets, powder, and primers are required. This includes the #11 caps.
#10's will work also, but the #11's will hold better to the nipples.
The best to you on your movie project.