The Perfect Drill Bit Size For Remington 870 Dimples Revealed

what size drill bit for 870 dimples

If you've recently purchased a Remington 870 shotgun and are looking to customize it with accessories, one task you may come across is drilling into the dimples on the magazine tube. These dimples are typically found on newer models of the 870 and can make it challenging to attach certain extensions or clamps. To tackle this obstacle, it's crucial to know what size drill bit you need for 870 dimples. Don't worry; we've got you covered. In this guide, we'll delve into the world of drill bits and provide you with the necessary information to get the job done efficiently and effectively. So, grab your drill and let's dig in!

Characteristic Value
Drill Bit Type Twist
Drill Bit Size 3/16 inch
Shank Size 1/4 inch
Flute Type Spiral
Material High-Speed Steel
Coating Black Oxide
Point Angle 118 degrees
Number of Flutes 2

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Drilling into an 870 shotgun with dimples can be a bit of a challenge if you don't have the right drill bit size. The dimples on the shotgun serve as a reinforcement for the barrel and provide added strength. If you drill into the shotgun without taking the dimples into consideration, you could potentially weaken the barrel and compromise the structural integrity of the firearm.

The recommended drill bit size for drilling into an 870 shotgun with dimples is 1/8 inch. This size provides a balance between removing enough material to create a hole, while still maintaining the structural integrity of the barrel.

Here is a step-by-step guide on how to properly drill into an 870 shotgun with dimples:

  • Ensure the shotgun is unloaded and the safety is engaged. Safety should always be your top priority when working with firearms.
  • Choose a suitable location for drilling. You should select an area that will not affect the overall performance of the shotgun and minimize the likelihood of stress on the barrel. It is recommended to consult with a gunsmith or experienced firearms enthusiast before proceeding.
  • Mark the desired location for the hole. Use a punch or a centering bit to create a small indentation that will guide the drill bit.
  • Attach the 1/8 inch drill bit to your drill. Make sure the drill is set to the appropriate speed for metal drilling.
  • Begin drilling slowly and with light pressure. The key here is to avoid forcing the drill bit, as this can cause the bit to wander or break. Let the drill bit do the work.
  • Once the drill bit has penetrated the dimpled surface, you can increase the drilling speed and apply more pressure. However, be cautious not to go too fast or use excessive force, as this can lead to damage.
  • Periodically stop drilling and remove the bit to clear any chips or swarf that may have accumulated. This will help prevent overheating and prolong the life of the drill bit.
  • Continue drilling until you have reached the desired depth. Be mindful of how far you are drilling to avoid accidentally drilling through the other side of the barrel.
  • Once the drilling is complete, inspect the hole for any signs of damage or stress. If any problems are detected, it is recommended to consult with a gunsmith or firearms expert for further guidance.

Remember, drilling into an 870 shotgun with dimples should only be done if absolutely necessary and with proper guidance. It is always recommended to seek the assistance of a professional or experienced individual when working with firearms to ensure safety and preserve the integrity of the firearm.

As you can see, drilling into an 870 shotgun with dimples requires careful consideration of the drill bit size, as well as following proper drilling techniques. By using the recommended 1/8 inch drill bit and following the step-by-step guide outlined above, you can safely drill into an 870 shotgun with dimples while minimizing the risk of damage and ensuring the continued performance of the firearm.

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Can I use a standard drill bit or do I need a specialized bit for drilling into dimples on an 870 shotgun?

When it comes to drilling into the dimples on the barrel of an 870 shotgun, using a standard drill bit may not be the best option. The dimples on the barrel are there to prevent the installation of a magazine extension, and drilling into them may compromise the structural integrity of the firearm. Therefore, it is important to use a specialized drill bit designed specifically for this purpose.

A specialized drill bit for drilling into shotgun barrel dimples is typically called a dimple jig. It is a simple tool that helps align the drill bit correctly so that the hole can be drilled safely and accurately. Using a dimple jig ensures that the hole is drilled in the center of the dimple, minimizing the risk of damaging the barrel or affecting its performance.

To use a dimple jig, follow these steps:

  • Gather the necessary tools and materials: dimple jig, drill, drill bit, lubricant (such as cutting oil), safety glasses, and a rag.
  • Ensure the firearm is unloaded and the magazine tube is empty. Safety should always be the top priority when working with firearms.
  • Attach the dimple jig to the shotgun barrel according to the manufacturer's instructions. The jig should fit snugly onto the dimple and provide a guide for the drill bit.
  • Apply a few drops of cutting oil or lubricant to the dimple area. This helps reduce friction and heat, making the drilling process smoother.
  • Insert the drill bit into the drill, making sure it is tight and secure. Use a drill bit that matches the size recommended by the dimple jig manufacturer.
  • Place the drill bit into the dimple jig, utilizing the guide provided by the jig. The jig will help keep the drill bit aligned and prevent it from wandering.
  • With a steady hand and controlled pressure, slowly drill into the dimple. Avoid applying excessive force, as it may lead to the drill bit slipping or damaging the barrel.
  • Periodically withdraw the drill bit to clear any shavings and prevent overheating. Wipe away excess cutting oil or lubricant with a rag to maintain a clean working environment.
  • Continue drilling slowly until the desired depth is reached. The depth will depend on the specific purpose of drilling into the dimples, such as installing a magazine extension or other accessory.
  • Once the drilling is complete, remove the dimple jig and inspect the hole. Ensure it is clean and free of any burrs or rough edges that could affect the installation of a magazine extension.

As with any firearm modifications, it is essential to follow applicable laws and regulations. If you are unfamiliar with gunsmithing or have any doubts about drilling into the dimples, consult a professional gunsmith for assistance. They have the expertise and proper tools to ensure the job is done safely and correctly.

In conclusion, using a standard drill bit is not recommended for drilling into the dimples on an 870 shotgun. To maintain the integrity of the firearm and achieve accurate results, it is advisable to use a specialized dimple jig and follow the outlined steps. Safety should always be the top priority when working with firearms, so if you are uncertain or unfamiliar with gunsmithing, seek professional assistance.

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Are the size of the dimples on an 870 shotgun consistent, or do they vary from model to model?

When it comes to the size of the dimples on an 870 shotgun, there is actually some variation to consider. While the overall design of the dimples remains consistent across different models of the 870, there can be some slight differences in size.

For those who are not familiar with the 870 shotgun, it is a popular pump-action shotgun that is often used for hunting and self-defense purposes. The dimples on the magazine tube serve an important function - they prevent the magazine from accepting more than the legally allowed number of shells. This feature is required by law in some states, as it helps to regulate the capacity of the shotgun.

The size of the dimples on the 870 shotgun can vary slightly from model to model. The most common size for the dimples is around 0.125 inches in diameter, but there can be some variation depending on the specific production run or modifications made to the shotgun after it leaves the factory. Some models may have slightly larger or smaller dimples, but the overall function remains the same.

To ensure that your shotgun complies with the legal capacity requirements, it is always best to consult the manufacturer's specifications or the local laws in your area. The size of the dimples may not be explicitly stated, but the manufacturer should be able to provide information on the maximum number of shells that can be loaded into the magazine.

In addition to the slight variation in size, it is also worth noting that the depth of the dimples can differ. The depth of the dimples can affect the number of shells that can be loaded into the shotgun. A deeper dimple will prevent more shells from being loaded compared to a shallower dimple.

If you are planning to modify your 870 shotgun, such as installing an extension tube or magazine plug, it is important to consider the impact on the size and depth of the dimples. Modifying the shotgun in a way that alters the function of the dimples may put you in violation of local laws or regulations.

To summarize, while there can be some variation in the size of the dimples on an 870 shotgun, the overall function remains the same. It is important to consult the manufacturer's specifications or local laws to ensure compliance with capacity requirements. If you are considering modifications to your shotgun, be mindful of the impact on the size and depth of the dimples to avoid any legal issues.

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Are there any specific guidelines or instructions for drilling into dimples on an 870 shotgun, in terms of depth or angle?

Drilling into the dimples on an 870 shotgun can be a common modification done by gun enthusiasts to improve magazine capacity or install accessories. However, it is essential to follow specific guidelines and instructions to ensure the integrity and functionality of the firearm.

Before we proceed, it is essential to note that modifying a firearm may void its warranty and potentially compromise its structural stability. Always consult with a qualified gunsmith or expert before attempting any modifications.

Here are some guidelines and instructions for drilling into the dimples on an 870 shotgun:

  • Understand the purpose of the dimples: The dimples on the magazine tube of the 870 shotgun serve as an indicator for the maximum legal capacity, providing a visual reference point for law enforcement and compliance with regulations. Drilling into these dimples will remove this indicator and may require additional steps to measure and verify the number of shells in the magazine.
  • Measure your desired hole depth: Before drilling, measure the desired depth of the hole you intend to create. Generally, a depth of up to 0.250 inches is safe for maintaining the structural integrity of the magazine tube. If you plan to use a longer extension or increase the magazine capacity significantly, consult professionals for advice on appropriate depth.
  • Select the right drill bit: For drilling into metal surfaces on an 870 shotgun, a high-quality cobalt or carbide drill bit is recommended. These drill bits offer greater cutting efficiency and durability compared to standard high-speed steel (HSS) bits. Ensure that the drill bit matches the size of the hole you intend to create.
  • Secure the shotgun in a vise: To prevent any movement or damage to the firearm, secure it in a proper vise or gunsmithing fixture. Place protective materials, such as soft jaws or leather pads, around the shotgun's receiver to prevent scratches or dents.
  • Mark the drilling spot: Use a center punch or a similar tool to mark the exact location where you want to drill the hole. This will help prevent the drill bit from wandering and ensure accuracy in hole placement.
  • Apply cutting lubricant: Apply a generous amount of cutting lubricant or oil to the drilling area. This helps reduce friction, keeps the bit cool, and prolongs its lifespan.
  • Drilling process: Set the drill to its lowest speed setting and gently start drilling. Maintain a steady, even pressure as you drill, and periodically withdraw the bit to clear any metal chips or debris. Keep the drill perpendicular to the magazine tube to ensure a straight hole. Avoid excessive heat buildup by applying cutting fluid intermittently during the drilling process.
  • Inspect the hole and clean up: Once you've drilled through the dimple, inspect the hole for any burrs or rough edges. Use a deburring tool or a fine file to remove any sharp edges and achieve a clean, smooth finish. Clean the area with a lint-free cloth or compressed air to remove any debris.

It is crucial to handle firearms with the utmost care and follow all necessary safety precautions. If you are unsure about any aspect of drilling into the dimples on an 870 shotgun or lack the required tools and experience, seek assistance from a professional gunsmith. They will ensure the modification is done correctly and safely.

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What are the potential risks or complications of using the wrong size drill bit for drilling into dimples on an 870 shotgun?

Using the wrong size drill bit when drilling into the dimples on an 870 shotgun can lead to potential risks and complications. It is important to understand the correct size and technique to ensure the best outcome.

One potential risk of using the wrong size drill bit is damaging the shotgun's barrel. The dimples on a Remington 870 shotgun are designed to prevent the magazine extension from unscrewing. The purpose of drilling into these dimples is to remove them, allowing for the installation of a magazine extension. If a drill bit that is too large is used, it can cause excessive material removal and compromise the structural integrity of the barrel.

Another risk is that using the wrong size drill bit may result in an improper fit for the magazine extension. This can lead to a loose or wobbly extension, which can affect the reliability and function of the shotgun. It is essential to use the correct size drill bit to ensure a snug and secure fit for the magazine extension.

Complications can also arise if the drill bit is not properly aligned with the dimples. The drill bit should be perpendicular to the barrel and centered on the dimple. If the drill bit is angled or off-center, it can cause uneven removal of material and potentially damage the barrel. Improper alignment can also result in an awkward or misaligned installation of the magazine extension.

To avoid these risks and complications, it is crucial to follow the proper steps and techniques when drilling into the dimples of an 870 shotgun. Here is a step-by-step guide for drilling into the dimples:

  • Gather the necessary materials: Remington 870 shotgun, drill, correct size drill bit, and a vice or clamp to secure the shotgun.
  • Secure the shotgun: Place the shotgun in a vice or clamp to ensure it is stabilized and won't move during the drilling process. This will help maintain proper alignment.
  • Mark the dimples: Use a marker or pencil to mark the center of each dimple. This will serve as a guide for the drill bit placement.
  • Select the correct drill bit size: Consult the manufacturer's instructions or research to determine the appropriate drill bit size for your specific shotgun model.
  • Align the drill bit: Hold the drill bit perpendicular to the barrel and position it over the first marked dimple. Ensure the drill bit is centered and aligned with the dimple before proceeding.
  • Drill the dimple: Start the drill at a slow speed and gradually increase the speed as you penetrate the dimple. Apply gentle pressure and avoid excessive force, as this can damage the barrel. Drill until the dimple is fully removed.
  • Repeat for other dimples: Once the first dimple is drilled, repeat the process for the remaining marked dimples.
  • Install the magazine extension: After all the dimples have been drilled, clean any debris or metal shavings from the barrel. Then, carefully install the magazine extension according to the manufacturer's instructions.

By following these steps and using the correct size drill bit, you can minimize the risks and complications associated with drilling into the dimples of an 870 shotgun. Remember to exercise caution, take your time, and seek guidance from professionals if needed.

Frequently asked questions

The recommended drill bit size for drilling into the dimples on an 870 shotgun is 5/32 inch.

The 5/32 inch drill bit size is recommended because it is the most common size used for drilling pilot holes in metal. It is also the size that most aftermarket magazine extensions are designed to fit.

While it is technically possible to use a different size drill bit, it is not recommended. Using a drill bit that is smaller than 5/32 inch may not provide a secure fit for an aftermarket magazine extension. Using a drill bit that is larger than 5/32 inch may cause the hole to be too big and may not provide enough material for the magazine extension to properly attach.

It is recommended to use a drill press for drilling into the dimples on an 870 shotgun. A drill press will provide more stability and precision, resulting in a more accurate and clean hole. However, if a drill press is not available, a handheld drill can be used as long as caution and care are exercised to ensure a straight and properly-sized hole.

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