Gauge Choke Tube Diameters. Remington has offered shotguns in 1.
The Model 8. 70 1. In 2. 00. 2, it was brought back into production with a Rem Choke barrel.
The Model 8. 70 Wingmaster in 1. Model 8. 70 Express was produced from 2. This newer version came with the following specifications: Bore diameter: .
Improved Cylinder choke: . Modified choke: .
Full choke tube: .
Installing Screw- In Chokes Without a Lathe. February 1. 3, 2. A lathe is preferable for choke work, but hard tools are an option if you don’t have access to the bigger machine. Here are some tips. By Chick Blood, American Gunsmith Book of the Shotgun. Maybe it’s the economy, or simply the urge to upgrade a favorite scattergun, but I’ve been getting many more requests recently to install choke- tube systems in shotguns that were purchased before choke tubes existed. In cases where the gun under consideration belonged to Grandpa, was passed on to Dad, I rarely undertake the modification. Today’s shotguns use 1.
Many older shotguns used a milder steel, such as 1. This isn’t to say an old gun will go to pieces the instant a high- brass shell is ignited in its chamber. It may not happen for another 1,0. It may never happen.
16 Gauge Choke Tube Installation Instructions
But if it does, the injured party’s lawyer will file a liability suit at the nearest county seat. I don’t want my name on it. And, I personally can’t stand the thought of ruining the value of a fine old Parker or Purdey by installing screw- in chokes and refuse the job on principle.
Until a few years ago, choke work required you to have a lathe with a bed long enough to accommodate a shotgun barrel. If you weren’t so equipped, the only way to accomplish the job was to send the gun to someone who was, perhaps another gunsmith or aftermarket suppliers like Hastings, or Colonial Arms. The latter two offer choke- installation services with trade discounts.
Though the lathe remains the favored method among those doing a great deal of choke work, it is no longer the only way. Simple hand tools, devised by Colonial Arms and Clymer Manufacturing of Rochester Hills, Michigan, have made choke- system installation possible without a lathe. This tooling is not cheap, and you must purchase it by gauge and type of choke tube system being installed.
Briley choke installation is the best in the industry! Choke Installation Briley offers choke installation for 12 gauge, 20 gauge, 16 gauge, 28 gauge, and.410.
I suggest you do a bit of research and purchase only the tooling that best suits you after discussing your needs with the sources listed here. Since I have some of Colonial’s 1.
The basic procedures are similar with any tooling you choose to buy. Taking the Measurements After making sure the gun is unloaded, remove the barrel, thoroughly clean the bore, and keep in mind during your measuring process that some manufacturers expand the end of their barrels. The order in which you take your measurements doesn’t matter, but take them all. For choke- tube installations, the bore diameter of a shotgun is measured internally from the end of the barrel’s forcing cone to the point where the choke begins at the barrel’s end.
If no choke exists, the bore diameter is measured from the end of the forcing cone to the end of the barrel. The standard bore diameters for U.
- Skeets shotgun bore gauge 843-200-146; Gilchrist choke. the barrel that is being considered for choke tube installation. Change Velocity- A 16″ 300.
- PROFESSIONAL CHOKE TUBE INSTALLATIONS. With each choke installation you receive three chokes of your choice, a speed wrench and a universal wrench.
- Colonial Choke Tube Skirt Iron $26.99. Choke Tube Installation Service; Contact Us; About Choke Tubes; Customer Service; Blog; Privacy Statement; Shipping & Returns.
S.–manufactured shotguns are as follows: 1. Gauge, 0. 7. 29 inch. Gauge, 0. 6. 67 inch. Gauge, 0. 6. 17 inch. Gauge, 0. 5. 50 inch. All of the above are +0. These bore- diameter differences that exist between manufacturers make no difference, however, when determining the amount of choke that exists in a fixed choked shotgun.
Regardless of gauge, when a shotgun’s business end has been constricted, or choked, the amount of that constriction is deducted from the bore diameter to provide the amount of choke. Constriction of the various chokes are as follows: Full, 0.
Improved Modified, 0. Modified, 0. 0. 20 inch. Improved Cylinder, 0. Cylinder Skeet #1, #2, 0. The actual choke diameter of a shotgun is the bore diameter, which can vary, plus the amount of constriction, which doesn’t vary. This should help explain why a full fixed- choke 1. Before You Start There are a couple of simple ways to find out whether the internal bore diameter of the shotgun will allow choke installation.
The first is to select the steel pilot included with the tooling kit that represents the maximum size for the gauge. Insert the pilot from the breech end of the barrel. If it drops easily into the bore, the bore is too big to be fitted with choke tubes.
Courtesy, American Gunsmith Magazine Colonial choke- tooling kits include five steel pilots, five bronze bushings, reamer, tap, and barrel spacer. A floating tap wrench, maximum bore gauge, and additional pilots and bushings are available separately.
Simpler still is to use a Colonial maximum bore gauge. These tools, available according to gauge, are inserted into the chamber and past the forcing cone. If the gauge continues into the bore, the barrel cannot be fitted with choke tubes. As a rule, you cannot install tubes in barrels with an internal diameter (ID) that exceeds 0.
Forging ahead regardless will definitely cause choke damage and the distinct possibility of barrel blowout. Before installing choke tubes you must also determine whether the wall thickness of the barrel after reaming will be sufficient to assure safe operation. Do this by measuring the outside diameter (OD) of the barrel at the place where the choke tube(s) will be installed with a reliable set of dial calipers.
Next, measure the OD of the tap you’re using. Subtract the OD of the tap from the OD of the barrel and divide that number by two to establish the barrel’s remaining wall thickness. If the resulting figure indicates the wall thickness will be less than 0.
16 Gauge Choke Tube Diameters. 16 Gauge Choke Tube Diameters; 28 Gauge Choke Tube Diameters; APACHE 77 RIMFIRE RIFLE; Are clay targets biodegradable? Are clay targets. Find great deals on eBay for 16 gauge choke tube winchester 1873. Shop with confidence. Choke tube instalation, choke tube installation. mike orlen 16 gauge choke tube install, teague choke installation cost, turn around time for briley chokes. Colonial Choke and Tool offers choke tube installation services. Labor Schedule of Charges: 10,12,16,20 Gauges.
Another element that must be included in your calculations is the concentricity of the barrel’s outside diameter with its inside diameter. If not concentric, the barrel will be thinner in some spots than in others and the problem of insufficient wall thickness could rear its ugly head. It will definitely come up if anemic areas are present immediately behind an existing, fixed choke or where the installation is to be performed on an unchoked gun. You may or may not be able to make allowances. For example, the minimum OD for a 1. Colonial choke tube installation is 0.
16 Gauge Choke Tube Installation Kit
Say the OD of the barrel on your bench measures 0. ID is thicker by 0. Dividing that variance by two equals - 0. OD becomes 0. 0. 83.
OD of 0. 0. 82. 5 inches. How do you measure OD and ID accurately and simultaneously? A Clymer- made barrel- wall thickness gauge allows direct measurement in 1.
The barrel to be checked out is slipped over the gauge’s contact ball and the indicator’s plunger lowered to contact the barrel. Both hands are used to move the barrel up and down between the plunger and the ball to give a direct reading of thickness at the point of contact. Barrels up to 3. 2 inches long can be gauged by measuring one half, turning the barrel around and measuring the other half. When using this tool, you never put too much pressure on the arm of the fork with the contact ball on its end.
This can cause the arm to flex slightly and give a thinner than actual read- out. As accurate as it is, you still have to be cautious in using this gauge, or whatever means you may use, when measuring Belgium Browning over/unders. There may not be enough metal between the barrels for choke tube installation even though your calculations tell you they’re perfect. Reaming and Tapping Slide the barrel seating spacer over the reamer until it stops on the reamer’s largest dimension. The spacer is a small, but very important, part of choke work because it will stop the reamer before the final choke seat is cut. As you’ll soon discover, forgetting to put it on can really louse things up.
Next, check to see if the barrel to be fitted with chokes is chrome lined. If it is, you must remove all chrome from its muzzle end before going any further. If we were employing a lathe, the chrome could be removed by facing the barrel. Since we’re not, wrap a piece of 2. Check your progress with cold blue, which colors the bare steel but not chrome. When you’re finished, thoroughly clean off the emery grit to avoid damaging the reamer. Courtesy, American Gunsmith Magazine.
Choke- tube tooling is available for all popular shotguns as well as for shotguns made long before choke tubes existed. Since it is fairly expensive, contact the sources listed for suggestions in determining which kit, or kits, might deliver the quickest return on your original investment. If the barrel has an existing, fixed choke and hasn’t been cut off to eliminate the choked area—which can be accomplished with a hack saw or chop saw—use one of the five steel pilots that come with the tooling.
They’re graduated in 0. The one you select should fit snugly into the bore with no wobble yet still turn freely.
Choosing a pilot that’s too small will allow the reamer to wander out of line with the bore during cutting operations and cause changes in the gun’s point of impact. Double check your choice and bear in mind that the next biggest pilot to the one you select, if there is one, shouldn’t fit into the bore at all. The chosen pilot is inserted from the chamber end of the barrel, its threaded end toward the barrel, and pushed gently down the bore. It will come to a stop when it reaches the existing choke; don’t try forcing it further. Now screw the end of the reamer into the pilot through the choke. If the barrel has no existing choke or has been cut off, use a bronze bushing that fits the bore without wobbling but still turns freely.
Like the steel pilots, five are included with the kit. They’re also graduated in increments of 0. However, you don’t drop or push the bushing down the bore in this situation. Instead, place it on the end of the reamer, insert it into the muzzle and make sure the reamer’s snap ring is in place. It acts as a stop for the bushing. You never use a bushing in combination with a pilot and you never use a pilot in combination with a bushing. Those in the kit will do most jobs but others are available and can be ordered from either Colonial or Brownells.
When it comes to the actual cutting, you have some options. You can use a special adapter to link the reamer to an adjustable speed hand drill run at no more than 5. You can use a different adapter to connect the reamer—or tap—to a hand brace. You can also use a hand held tap wrench.