The Carlson’s Bismuth Bone Buster is a mid-range choke tube made for Browning Invector-Plus 20 gauge shotguns. It is CNC precision machined from 17-4 heat-treated stainless steel and features a longer internal parallel section compared with many factory choke tubes. The choke is specifically developed to produce dense patterns with bismuth ammunition and is listed as compatible with lead and Hevi-Shot; the mid-range variant can also be used with steel shot. The design balances pattern density and shot compatibility for field use where non-toxic shot is selected.
Key Specifications
- Constructed from 17-4 Stainless Steel for durability and corrosion resistance.
- Designed for 20 Gauge Browning Invector-Plus choke systems.
- Uses a Mid-Range constriction profile intended to deliver dense patterns.
- The listed constriction diameter is .025.
- Supplied in an Invector-Plus configuration to fit compatible Browning tubes.
- Package contains One Choke tube.
- Compatible with bismuth shot and also usable with lead and Hevi-Shot loads.
- Can be used with steel shot when using the mid-range constriction.
- Manufactured with CNC precision machining for consistent internal dimensions.
- Features a longer internal parallel section compared with many factory tubes to influence pattern behavior.
This choke tube offers a practical option for shooters selecting bismuth and other non-toxic shot types who want consistent, dense patterns from a Browning Invector-Plus 20 gauge system. Its stainless construction and precision machining make it a durable choice for regular field use, while the mid-range constriction provides a balance between spread and pattern density for a variety of loads.
