The Bismuth Bone Buster choke tube is designed to produce excellent, dense patterns with all Bismuth ammunition. It is CNC precision machining from 17-4 heat treated stainless steel featuring a longer parallel section (inside the choke) over conventional factory choke tubes. Combine this with extensive testing with various loads and you have the perfect choke to deliver devastating patterns with Bismuth. The Bismuth chokes can be used with all lead and Hevi-Shot loads. Experience the Bone Crushing dense patterns with the Bismuth Choke Tubes. The Extended Range choke tube can be used with all steel shot not larger than #2.
Specifications:

Type
Gauge	20 Gauge
Constriction Type	Extended Range
Configuration	Invector
Finish
ConstrictionDiameter	.040
Chokes Included	1
Recommended For
Material	17-4 Stainless Steel
Approved
Ported