The Carlson’s Bismuth Bone Buster Win Choke 20 Gauge Extended Range Choke Tube (brand part number 09225) is CNC precision machined from 17-4 heat-treated stainless steel and tuned specifically to pattern Bismuth ammunition. A longer parallel section inside the choke, combined with extensive load testing, produces dense, consistent patterns with Bismuth shot, and the tube also runs lead and Hevi-Shot loads without issue. Built for a Winchester-pattern barrel in the Extended Range constriction, it can also handle steel shot up to size #2.

Key Specifications

• Sized for 20 gauge shotguns for a direct fit.
• Threads into the Win Choke pattern used by Winchester barrels.
• Ground to an Extended Range constriction.
• CNC machined from 17-4 heat-treated stainless steel.
• Tuned to produce dense, consistent patterns with Bismuth ammunition.
• Also rated for lead and Hevi-Shot loads.
• Rated for steel shot up to size #2 in this constriction.

Frequently Asked Questions

What ammunition is this choke built for? Bismuth, though it also runs lead and Hevi-Shot loads.

Can I use steel shot? Yes, up to size #2 in the Extended Range constriction.

Buy the Carlson’s Bismuth Bone Buster Win Choke 20 Gauge Extended Range Choke Tube

Get dense, devastating patterns with Bismuth loads. Order it from our Carlson’s lineup, part of our shotgun chokes selection, at our Lubbock, Texas gun shop for fast, direct shipping.