Replacing the barrel on a Remington 700 in .308 caliber, especially to add threading, is a significant undertaking. It requires specialized tools, a safe workspace, and a good understanding of firearm mechanics. This guide provides a detailed walkthrough, but always prioritize safety and consult a qualified gunsmith if you lack experience. Improper barrel installation can lead to dangerous malfunctions.
Why Replace a Remington 700 Barrel?
There are several reasons why a shooter might choose to replace the barrel on their Remington 700 .308:
- Accuracy Issues: A worn or damaged barrel will significantly impact accuracy. Replacing it with a new, high-quality barrel can dramatically improve shot grouping.
- Thread Addition: Many shooters want to add threads to the barrel for mounting suppressors or muzzle brakes. This requires a barrel replacement, as it's generally not feasible to thread an existing barrel without significant risk of damage.
- Caliber Change: While less common for a .308, you might want to change the caliber of your rifle. This necessitates a complete barrel replacement.
- Barrel Wear: Even with proper cleaning, barrels eventually wear out. This wear leads to decreased accuracy and increased pressure.
- Upgrade: Upgrading to a heavier, match-grade barrel can enhance accuracy and stability, especially for long-range shooting.
Tools and Materials Required
Before starting, gather all necessary tools and materials. Lacking even one item can significantly delay or complicate the process.
- Action Wrench: Specifically designed for Remington 700 actions. Improper tools can damage the action.
- Barrel Vise: A sturdy barrel vise is crucial to securely hold the barrel during removal and installation.
- Headspace Gauges: Essential for verifying correct headspace after barrel installation. Incorrect headspace is extremely dangerous.
- Go/No-Go Gauges: These verify that the barrel is properly installed and headspace is correct.
- Action Square: Ensures the action is square in the vise to prevent damage during installation.
- Torque Wrench: Crucial for tightening the barrel nut to the correct specification. Over-tightening can damage the action.
- New Barrel: Choose a barrel appropriate for your Remington 700 action and desired specifications (length, twist rate, threading).
- Barrel Nut: A new barrel nut will usually be needed, always ensure it's the correct one for your barrel and action.
- Thread Protector (optional): Protects the threads when not using a suppressor or brake.
- Thread lubricant: Ensure proper lubrication when threading the new barrel.
- Cleaning Supplies: Thoroughly clean all parts before and after installation.
- Safety Glasses: Protect your eyes from flying debris.
- Gloves: Protect your hands.
Step-by-Step Barrel Replacement Process
This process is simplified for clarity. Always consult detailed instructions specific to your chosen barrel and action.
1. Disassembly:
- Carefully remove the bolt from the action. Note the orientation of any parts, such as the ejector.
- Using the action wrench, remove the barrel nut. This may require significant force.
- Remove the old barrel from the receiver. This will be easier with the assistance of a barrel vise.
2. Preparing the New Barrel:
- Inspect the new barrel for any flaws or imperfections.
- Clean the new barrel thoroughly before installation.
3. Installing the New Barrel:
- Carefully install the new barrel into the receiver. This will require careful alignment.
- Tighten the barrel nut to the manufacturer's specified torque. Use the torque wrench precisely to avoid damaging the action.
4. Headspace Check:
- This is the most critical step. Using headspace gauges, verify headspace is within the manufacturer's specifications. Improper headspace can result in catastrophic failure.
5. Reassembly:
- Reassemble the bolt and any other parts removed during disassembly. Make sure they are properly aligned.
6. Final Checks and Function Testing:
- After reassembly, perform a thorough function test.
- Ensure the action cycles smoothly and accurately.
- Inspect the firearm for proper function and look for any issues before use.
Safety Precautions:
- Always handle firearms safely. Treat every firearm as if it were loaded.
- Work in a well-ventilated area.
- Never point a firearm at anything you do not intend to shoot.
- Wear appropriate safety gear.
Case Study: A Failed Barrel Replacement
A friend attempted a barrel replacement without proper tools or experience. He over-tightened the barrel nut, damaging the action. This necessitated professional repair, costing significantly more than if he had used a gunsmith in the first place.
This highlights the critical importance of either having significant experience with gunsmithing or engaging a qualified professional. This is not a DIY project for beginners.
Disclaimer: This guide is for informational purposes only. Replacing a Remington 700 barrel is a complex process that should only be undertaken by experienced individuals or qualified gunsmiths. Incorrect installation can lead to serious injury or death. Always consult the manufacturer's instructions and seek professional help if needed. Improper headspace can lead to catastrophic failure, causing significant injury or death. This guide is not a substitute for professional gunsmithing services.