Ni Forsendelse Læne shotgun chokes for slugs Numerisk Kanon rækkevidde
Choke Tubes: A Beginner's Guide
Ballistic Machinist - This is a Remington 870 barrel with a built in improved cylinder choke. It has a muzzle diameter of .715 and was made in the early 70's. It has
Rifled Choke Tubes: What You Need to Know | An Official Journal Of The NRA