ORIGINAL: 3DNWV
I aquired a High Standard SUPERMATIC Deluxe 20 ga today. it is mark 20ga 2 3/4-3 I cant figure out how to tell if it is mod or full choke can any one tell me how to tell? it is in 98-100% except for the recoil pad is flatened due to being set on it for 30yr does anyone know where I can get a matching replacement for it. Thanks
Simple! Just put up a patterning board, and see what percentage of the shot hits inside a 30" circle at 40 yards!!
Per the Shooter's Choice "SHOOTER'S TIPS & FACTS" board.....
"For years manufacturers have determined shotgun barrel choke measurements - full, modified and improved cylinder and variations of those - by what percentage of the shot charge printed in a 30-inch circle at 40 yards. But in actuality the degree of choke in a barrel is simply a measure of constriction from the bore to the muzzle. Since virtually all interior barrel dimensions are different, often ranging up to 20 thousandths of an inch gun-to-gun, there is a better way of determining your choke. "The choke is determined by the difference between the diameter of the bore relative to the diameter of the choke," says shooting expert Joe Ventimiglia, president of Shooter's Choice gun care products. "