The Chadwick & Trefethen ‘B’ Adjustable Reamer is a choke-reaming tool from Chadwick & Trefethen, built for expandable-choke work and sized to the B position in their lettered reamer lineup, one step from the A size. A gunsmith uses it to cut a shotgun barrel’s choke constriction to a different, typically more open, pattern as part of an expandable choke conversion or repair. Reaming choke work is a one-way operation, so having the correctly sized reamer for the job matters more than with most gunsmithing tasks. It’s aimed squarely at gunsmiths doing dedicated choke modification work rather than general shop use.

Key Specifications

• B-position sizing in Chadwick & Trefethen’s lettered adjustable reamer lineup.
• Expandable choke reaming function lets a gunsmith open a shotgun barrel’s fixed choke to a different constriction.

Frequently Asked Questions

What is this reamer used for? Cutting a shotgun barrel’s choke constriction as part of expandable-choke conversion or repair work.

How does this differ from the ‘A’ reamer? It’s the next size up in Chadwick & Trefethen’s lettered reamer lineup.

Buy the Chadwick & Trefethen ‘B’ Adjustable Choke Reamer

Add this reamer to your gunsmithing tool kit, shipped fast from our Lubbock, Texas gun shop.