TRULOCK TIP…GET A SHOTGUN THAT FITS!

  • Help Your Shotgun Shoot Where You Look, Get it Fitted.
  • Tune Your Fitted Shotgun With the Right Choke
  • Choke Tubes are a Shooters Best Friend…Learn More

By Blake Tabb

Understanding chokes, pellet density, range, and percent of pellets on target at a variety of ranges will make you more successful on the target range or the next time a flock of big honkers descend on your blind.

The excited chatter of big honkers descending on the blind echoes through your head like a reoccurring dream. The big birds cup their wings, drop their feet and start to backpedal for a landing and are so close you can see the ridges on their tongues when they honk. The command is yelled to “take them!”-hunters emerge from blinds. Who can hit a moving target that can change direction in a fraction of a second?

The straight shooters in the crowd and those at the trap and skeet range are the ones who have a shotgun that fit properly. The fit of a shotgun is considerably more important than it is with rifles. The basics of shooting come into play, where a rifle is aimed, a shotgun is pointed. Your eye creates the critical line down the barrel and acts the same as the rear sight on a rifle. If your shotgun fits properly and you can mount it to your shoulder the same every time, the result should be that your shotgun shoots where you look.

The main considerations are the length of pull, drop at the comb and at the heel, but for most, it’s not critical to know those dimensions. Most important is that you mount your shotgun so your eye looks straight down the barrel where you should see the bead, but not the top surface of the rib. Many shotguns on the market come with a spacer kit and adjustable combs to help ensure a proper fit.

When your shotgun is shooting where you are looking, you can maximize your hit rate by utilizing different choke tubes. Trulock Choke Tubes specializes in constriction tubes that maximize the effective shot pattern at a specific distance and for a particular target.

Hunters often carry an assortment of chokes to maximize their shotgun pattern on decoying birds or those birds that might be a little decoy shy. Trap, skeet, and sporting clay shooters can benefit greatly by packing a close-range choke like a cylinder, skeet or improved cylinder or a mid-range choke such as skeet 2 or modified choke to break intermediate range targets.

It’s easy to spot a shooter who uses a shotgun that fits. More birds fall from the sky and more clays shatter into pieces. Choke tubes are a hunter or target shooter’s best front-end offense to hitting more targets.

Explore the many options of choke tubes to fit most shotguns at trulockchokes.com.

The staff at Trulock Chokes prides itself on providing excellent service and an excellent line of products. In the event you are not completely satisfied with your purchase you can return it for a refund or exchange within 60 days from the date of purchase – with other firms, the moment you open it, you own it. For more information, please visit WWW.TRULOCKCHOKES.COM.

What Causes Shotgun Choke Tubes To Lock Up Or Freeze In The Barrel? (Part 2 of 2)

  • STUCK CHOKE TUBES from USE of STEEL SHOT

By George Trulock

Rust, residue build-up and choke expansion CAN ALL OCCUR at the same time, making the removal of your choke tube a very difficult task.

Choke tubes frozen in place from expansion is different from rust or residue build up.

Keep in mind, however, that rust, residue build-up and choke expansion CAN ALL OCCUR at the same time.

Without getting to deeply involved in the science of metals you need to know that when a shot charge passes through a choke tube it exerts a force in two different directions.  Force is applied to the choke tube when the shot charge strikes the choke forcing cone.

The first direction is longitudinal.  The force in this direction simply tries to push the choke out of the barrel.  This is prevented from happening by the interlocked threads on both the choke and the internal threads of the barrel.  If enough force is exerted then the threads in the barrel and or the threads on the choke shear and out it goes.  I have never seen a choke fail from thread shear.

The second direction is at approximately right angles to the bore.  In this direction the applied force tries to make the choke expand. As the shot column moves through the choke tube forcing cone, the pellets are in constant movement to rearrange themselves so that the shot column becomes smaller in diameter and elongated.  This generates a force that wants to expand the choke tube.

Factors to consider:
* Steel is elastic to some degree.
* If enough force is applied the choke tube will expand by a small amount and when the force is removed it will contract to its original size and shape.
* One of the ways we measure the strength of steel is by “Yield Strength”.
* For our purpose we can define yield strength as the maximum amount of force that is applied that does not cause any permanent deformation of the steel.
* If we increase the level of force past the yield strength of the steel used in that choke, it will expand past its elastic limit and stay in this expanded size.
* If you continue to shoot this load in this choke tube it will expand a small amount each time and at some point it will be solidly locked into the barrel.
* This force reaches its peak nominally at the intersection of the choke forcing cone and the parallel section. This is the area where choke expansion will occur.
* Choke tubes in this condition cannot be removed by normal methods.

The actual force is generated from a number of combined factors:
1. Size of steel shot. The larger the diameter of the shot the more force is created
2. Weight of the shot charge. Heavier payloads cause higher forces
3. Choke constriction. More constriction causes higher forces
4. Velocity. The higher the velocity the more force is created
Very high velocity steel shot shells with large diameter (particularly size B and larger pellets) through tighter (typically full or tighter) constriction chokes are usually the culprit causing choke expansion.

One of the best ways to prevent choke expansion is to follow the choke manufacturer’s recommendations.

* Some choke manufacturers will mark the choke “no steel” if it is not rated for steel.
* Some mark the choke “approved for steel”
* All factory chokes, as a rule, are rated for steel shot loads from cylinder bore through modified constriction, at least all that I have seen.
* If you use a factory choke tighter than modified that is not marked for use with steel, I would check it on a regular basis for choke expansion.
* If you find a choke tube that gets progressively harder to remove and replace each time you do so, examine it carefully as it is probably failing from expansion.
* If in doubt whether a choke is rated for steel, contact the manufacturer.

In my experience with steel shot I have found that if a choke does not expand with a given steel load after 25 shots it will never expand. Don’t take that as a fact as nothing is 100% when it comes to shotguns. However to date, this rule of thumb has never failed me.
While this is certainly not intended to be a true technical paper, hopefully it has given you a basic understanding of why choke tubes can and do freeze in the barrel.

For more information on Trulock Choke Tubes, visit http://www.trulockchokes.com.
Sincerely,
George Trulock

1-800-293-9402 work; 229-762-4050 fax
Email: trulock@trulockchokes.com

 

What Causes Shotgun Choke Tubes to Lock-Up or Freeze-Up in the Barrel? (Part 1 of 2)

By George Trulock

I’m sure a lot of shotgun shooters have encountered this dreaded problem.

You start to remove the choke from your shotgun and it will not budge.

You increase the pressure on your choke wrench and still get no movement.

You eventually end up putting enough torque on the wrench that it causes your face to turn red and your arms too start to tremble. The choke still does not move.

You then find some sort of tool to give you additional leverage on the wrench and the darn choke tube still refuses to budge.

You start to wonder what you did to cause this problem!!

There are BASICALLY THREE THINGS THAT WILL FREESE UPA SHOTGUN CHOKE IN THE BARREL:

  1. Rust
  2. Residue build up from fired shells (unburned powder, fiber, plastic, etc.)
  3. Choke tube expansion (Creep)

If you want to keep your shotgun chokes functioning as they were intended, then TAKE CARE OF THESE BASIC MAINTENANCE ITEMS ON A REGULAR BASIS:

  1. LOOSEN & RETIGHTEN the choke on occasion. Even better if you REMOVE the choke and REINSTALL in the barrel on a regular basis. This will break any bond that is attempting to form.
  2. CLEAN CHOKE BODY and REMOVE RESIDUE from the threads with a stiff brush and solvent of some kind.
  3. CLEAN INTERNAL THREADS and CHOKE COUNTERBORE in the barrel.  USE BRONZE BORE BRUSH and SOLVENT.
  4. WIPE SURFACES DRY, then LUBRICATE them with a few drops of high quality GUN OIL.

Sincerely,

George Trulock

 

1-800-293-9402 work, 229-762-4050 fax

trulock@trulockchokes.com