Tag: lead dispersion

Bullet Trap Comparisons, Pt. 1

Posted on by Action Target

For many years, bullet trap technology has been mired in confusion, misunderstanding, and misinformation. The various approaches to bullet containment and disposal have become as diverse as they are numerous. The purpose of this article is to provide accurate information and valuable education by examining various bullet trap theories, technologies, and applications in an objective manner.

The following information represents the views and opinions of Action Target based on our experience and observations. You are encouraged to conduct your own research and speak with other users about their experiences with the various bullet trap technologies presented.

Sand Berm

Sand Berm 1The sand or dirt berm is the oldest and most basic type of bullet trap. It uses the mass of the berm itself to stop and store bullets, and on outdoor ranges it can literally be the side of a mountain. On indoor ranges however, some type of structure or barricade is used to support the berm and hold back the sand.

On ranges where qualification or other events where tightly grouped shooting patterns are common, concentrations of lead called hot spots can form behind the targets causing subsequent shots to ricochet and bounce back toward the shooter. In order to recover spent bullets, the berm must be mined and the lead separated out. A certain amount of the sand will be contaminated and must be replenished each time the trap is cleaned. Sand and dirt berms are coming under increasingly harsh environmental scrutiny due to high lead levels in the ground around the trap and the tendency of the lead to seep into surrounding ground water.

The benefits of a sand berm include low cost, relatively low maintenance, and the ability to use any kind of ammunition.

Weaknesses include potential environmental hazards, expensive mining, and hot spot ricochet.

Pit and Plate Trap

Pit and Plate Trap

With this application, a steel plate is used to redirect bullets into a bed of sand. The steel is often called a “smash” plate because the acute angle—in this case, anything greater than 25 degrees—causes bullets to smash into small pieces on impact before they are scattered on the sand below.

Because the lead fragments rest mostly on top of the sand, this trap must be cleaned frequently by mining the lead from the sand and disposing of it properly. Under moderate to heavy use, a thick lead build-up can develop in the back corner of the trap causing bullets to be deflected back toward the shooter.

The benefits of a pit and plate trap include lower initial cost and simple installation.

Weaknesses include bullet fragmentation on impact, lead build-up, ricochet, and high maintenance.

Water and Plate Trap

Water and Plate Trap

The water and plate trap is similar to the pit and plate trap, except the sand is replaced by a large trough of water. Bullets still fragment into small pieces after impacting the smash plate, but with this system, they splash into the water and sink to the bottom of the trough. To retrieve the lead, you must shovel or scoop it from the water and dispose of it properly. The water in the trough must be replenished due to evaporation, and the evaporation can cause increased humidity on your range and problems with your ventilation system.

The benefits of a water and plate trap include lower lead dust levels and no ricochet off other bullets.

Weaknesses include bullet fragmentation on impact, maintenance of the water, and the limitation to indoor use only.

Venetian Blind Trap

Venetian Blind Trap 1

This older application uses a series of angled steel smash plates to redirect bullets to the back and bottom of the trap. Some versions of this trap have the smash plates mounted loosely to help absorb some of the bullets’ energy, but the acute angle of the plates can still cause significant fragmentation. To keep bullet splatter from bouncing back at the shooter, rubber curtains are often mounted across the entire face of the trap.

Because rubber is destroyed every time you shoot into it, these curtains must be replaced or patched frequently to maintain their effectiveness.

The benefits of a venetian blind trap include the durability of steel, no sand or granules, and a small floor space requirement.

Weaknesses include bullet fragmentation on impact, splatter and ricochet, no close-range shooting, and maintenance of the rubber curtains.

Escalator Trap

Escalator Trap 2

This is another old-fashioned steel trap that uses steeply angled smash plates to stop bullets and direct the fragments to an open collection area. Some manufacturers recommend that the impact plates be coated with oil to provide lubrication and reduce fragmentation. This oil can be washed away into the surrounding soil if the trap is not protected from the elements in outdoor applications.

The same system of protective rubber curtains may also be necessary with this trap due to the acute angle of its steel smash plates.

The benefits of an escalator trap include the durability of steel and no sand or rubber granules.

Weaknesses include bullet fragmentation on impact, no close-range shooting, maintenance of the rubber curtains, and poor lead storage and collection.

Rely on the Experts for Help

There are hundreds of things to take into consideration when building a shooting range, but your top priority should always be safety. Before anything else, make sure your range is going to be safe for your customers, your employees, and the environment. If you are considering building a range, talk to the Action Target representative in your region and he will be happy to help you find the right equipment to fit your needs and budget.

 

Myths About Wet Steel Traps

Posted on by Action Target

Wet Steel Trap 1As with anything else in life, the ability to make an informed decision is based on the quality of the information you receive. The purpose of this article is to explore some of the claims associated with using water on steel funnel traps.

This information represents the opinions of Action Target based on the experience and observations of our range consultants and engineers. We encourage you to conduct your own research and speak with other users about their experiences with the various bullet trap technologies presented before drawing your own conclusions.

CLAIM #1: You can use any type of ammunition on a wet steel trap.

It has been reported that frangible ammunition may cause problems with wet funnel traps because the powder created by certain types of disintegrating bullets can mix with the water and harden into a cement-like substance resulting in an extremely difficult cleaning process.

CLAIM #2: Wet steel traps eliminate lead dust on your range.

If a bullet strikes an area on a wet steel trap where the water and oil mixture is flowing (like on the bottom plates), the amount of lead dust generated at the trap on initial impact may be reduced. But if the bullet hits on the upper plates where no water is present, lead dust can be generated much the same as on a trap where no water system is in use. Also, lead dust containment systems such as water are meant to deal with lead on the bullet trap itself. They typically have little or nothing to do with emissions at the firing line or other areas of the range.

CLAIM #3: Wet steel traps capture all pullets whole and eliminate splatter and ricochet.Wet Steel Trap 7

The gently sloping angles of steel funnel plates do help prevent bullet breakup on initial impact, but bullets can also fragment into small pieces once they enter the rear chamber and strike more steel surfaces inside. Also, many designs include a vertical edge at every seam where two chambers meet and are attached to each other. Deflectors are typically used to protect these vertical edges, and bullets can fragment more significantly if they strike these deflectors. Our observations would indicate that the degree of bullet fragmentation is mostly related to the velocity of the bullet. Slower pistol rounds may be able to be captured more whole when using a primary decelerant or lubricant such as water, but faster rifle rounds tend to disintegrate whether the water is present or not.

CLAIM #4: Wet steel traps are more environmentally friendly.

A doctor’s first and fundamental responsibility is to do no harm and to not make a difficult situation worse than it already may be. The same can be said for a bullet trap. Because lead disposal is already difficult enough for most shooting ranges, the last thing we thing a bullet trap should do is to complicate the matter by mixing the lead with other substances such as water, oil, chlorine, or antifreeze.

CLAIM #5: Wet steel traps function equally well indoors and outdoors.Wet Steel Trap 9

Referring back to claim #4, it can be much more difficult to contain all potential contaminants generated by a wet steel trap on an outdoor range. Rain, snow, ice, wildlife, leaves, twigs, and other clogging debris can complicate matters when operating outdoors.

CLAIM #6: One piece welded funnel plates are better than modular funnel plates.

If everything is welded together on site, you can end up with a bullet trap that is much more difficult to service or repair should anything go wrong. Long, continuous sheets of plate steel can be more prone to stress fractures and cracking than shorter, modular plates. That is one reason why bridges and overpasses are often formed by bolting together multiple modular pieces. When modular funnel plates and joint systems are properly designed, you get a strong and maintenance-friendly bullet trap that requires no sacrifice of safety or performance.

CLAIM #7: Funnel plates mounted at a 12 or 13 degree angle function significantly better than funnel plates mounted at a 15 degree angle.Wet Steel Trap 6

If a 12 or 13 degree slope is better than a 15 degree slope, then isn’t 11 better than 12? Why not drop to 9 degrees? Or 7? Since every degree you go down can increase the cost and the front-to-back size of the trap, there is a point at which you can reach the point of diminishing returns. All other factors being equal (steel hardness, bullet trajectory, etc.), our high speed video tests do not reveal any significant difference between impacts at 12 or 15 degrees. Although it is possible to install an Action Target trap with plates mounted at either 12 or 13 degrees, we believe 15 degrees to be optimal for most uses.

CLAIM #8: A 30-inch diameter in the circular deceleration chamber is better than a 26-inch diameter.

Following the same logic, why not use a 40-inch diameter? Why not 50? Again, it is important to weigh multiple factors such as performance, cost, and space. Action Target believes that the most important thing about a chamber is that it effectively contain rounds, that it have a good service life, and that it can be easily serviced if and when the need arises. We believe our chamber design achieves these values in an optimal way.

CLAIM #9: Wet steel traps don’t require much maintenance.Wet Steel Trap 8

Regular maintenance should be expected with any bullet trap, regardless of the materials used. Just like anything else, range equipment must be properly cared for to keep it working.

The wet steel trap designs we have seen include a water pump, spray nozzle, and filter systems that should be regularly maintained. Potential debris like cardboard, paper, wood, and shotgun wads can certainly be a problem if they are introduced into these systems. Lead should be removed from the collection system and disposed of properly. And we recommend you account for any exposure the lead may have had to water, oil, chlorine, or antifreeze. Water sources should be maintained and you should deal with any potential sources of flooding or leaking. In some cases, an external settling pond or a drainage tank with a waste trap may be needed to keep contaminated water from entering the sewer system. Finally, you should consider any additional effect the potentially higher humidity may have on your ventilation system and any HEPA filters.

 

NOTE: None of the photos used in this article are of Action Target bullet traps.