We increased the chamber size of the challenge wheeze to get increased volume and range out of it

4 oz Gear Ratio: 7

8in round stand uses little floor space

You will see patterns similar to a full constriction choke on paper

Patternmaster 12ga Browning Invector DS Code Black Timber Brand_Harris We increased the chamber sizeDescription Patternmaster 12ga Browning Invector DS Code Black Timber Patternmaster's CODE BLACK TIMBER tubes will extend out the end of your barrel about 3 8 of an inch and has an effective range out to 40 yards. You will see a pattern similar to an Improved Cylinder constriction choke on paper, but because of the patented "stud ring" inside the tube, there is a much shorter shot string. This shorter shot string will allow more shot on target all at