The Professional Shotgun Bore Micrometer Set by 100 Straight Products is a complete dial bore micrometer set that accurately measures bore diameter, choke constriction, chamber (except 10 gauge chambers), and forcing cone dimensions.

BROWNELLS SHOTGUN MAINSPRING TOOL | Brownells BROWNELLS SHOTGUN MAINSPRING TOOL | Brownells

For best results, any existing choke should be removed with the Angle Blade Expanding Choke Reamer prior to using the Manson Precision 20 Gauge Reamer. The tap and reamer set can thread barrels to accept original equipment and aftermarket replacement tubes from Win-Choke, Browning Invector®, Mossberg Accu-Choke®, Weatherby, and Colonial Arms. The tool is made of hardened steel shank and plastic handle, providing maximum control and leverage. It eliminates the frustration of scratching and gouging the plunger or inner receiver surfaces with an ordinary screwdriver. The Remington 870 Rivet Staking Tool Set by Brownells is a two-punch kit that helps fit the 870 ejector spring and housing onto Remington's unique 2-step rivet easily. The NYLON/BRASS DRIFT PUNCH is a combination punch designed for gunsmiths, machinists, and toolmakers. It has a hi-impact steel handle with a knurled grip for easy holding and accurate control.Made with a plastic knob, aluminum fingers and handle, and stainless steel body, this choke tube wrench is available in both 12 gauge and 20 gauge.

Shotgun Combo Gauge, BoreMaster Robert Louis Company, Inc. - Shotgun Combo Gauge, BoreMaster

The Dent Raiser is 22-3/8" (56.8cm) long, has a 1" (2.5cm) dia. hardwood handle, and is suitable for Universal Shotguns. Detailed operating and maintenance instructions are included. MEASURING CHOKES — The BoreMaster as the “De-Liar.” The results obtained by measuring your fixed or screw-in chokes will surprise you. What one manufacturer calls Mod is another’s I.C. Buy screw-in chokes (12 ga) designated for steel shot and I.C. may be 0.003″ Modified around 0.010″ and Full AT 0.018″. These are readings from a Perazzi Mirage with Briley thin wall chokes for steel shot. Those of you with Polychokes can now accurately find the TRUE choke constriction for each designation on the Polychoke. These numbers will both surprise and enlighten you and add to the usefulness of this great product. Spring-loaded probes always exert equal pressure on the bore, making readings accurate and repeatable The Universal Fitting Fixture by Graco Corp is designed to securely hold GraCoil, Graco Adjustable Butt Plates, recoil pads, or other butt plate hardware while cutting and grinding to proper size and contours. The kit includes two punches, each 3-½" long, with a hole in the face of the #1 tool to fasten the ejector housing to the receiver with the lower portion of the rivet. The #2 tool secures the ejector spring within the ejector housing with the upper portion of the rivet.The Briley 20 GA. Tube Wrench is a universal wrench that fits all factory choked shotguns and Briley X-2 tubes, except for Briley special thinwall tubes. RIFLE BARREL CHAMBERS can be accurately measured. Calibers with case diameters over .400″ – that includes the 30/30 and 30-06 variations — and metrics like the 8 mm and 7 mm Mauser and larger can be measured. Obviously the barrels have to be removed from bolt or lever guns, but single shots and any break guns are readily measurable. This is an extremely fast and accurate method of verifying a gun’s chamber – especially unusual metric, Continental, British or obsolete American barrels. It also verifies if a chamber has been altered to a wildcat configuration. MEASURING CHAMBER LENGTHS. When buying or evaluating British and Continental guns, chamber length is a critical factor in the gun’s value. An expensive side-by-side marked 2-1/2″ chamber length on the barrel flats may be worth its full value until you measure the chamber length with the BoreMaster and discover that during the gun’s life, someone lengthened the chambers without reproofing the gun. Now what is it worth? Have the forcing cones been altered?