How To Build A Luty Gun

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Firearms, more unremarkably known as guns, are used past outdoor hunting enthusiasts. Some hunters may cull to make their own guns, rather than buying them, to become a custom firearm. The about difficult role of edifice a gun is to create a butt that will direct the fired round at the desired target. The barrel also imparts a spin to the round as it travels down the barrel, which gives the circular gyroscopic stabilization as it flies to the target. Utilise these tips to learn how to make a gun barrel.

Steps

1
Choose the type of steel to be used for the gun barrel. The steel chosen must accept a force of 100,000 psi (689476 kPA) to withstand the force of the gasses that propel the round. The steel should have a hardness of 25 to 32 on the Rockwell scale so that the steel is strong enough to contain the pressure level necessary to propel the round through the barrel, but non so brittle that it volition be harmed past the machining operations to be performed.^[1] Obtain one.25 inch (31.75 mm) rods from a specialty steel mill. Ask for a quality certification on the steel. Specify that the steel must be stress relieved at the steel mill.
- Select 4140 chrome moly steel. Chrome moly steel is the least expensive culling. It also is easier to chemically blacken, if desired, to give a traditional await to the barrel.
- Make up one's mind on 416 stainless steel. Stainless steel is more expensive than chrome moly Steel. Stainless steel barrels have have a longer service life and are upshot in a more authentic firearm than do chrome moly steel barrels.
2

Cut a piece of steel for the butt stock. Cut a length of steel effectually 28 inches (71.1 cm) to 30 inches (711.2 mm to 762 mm).^[2] Ensure that the ends of the butt stock are true in parallelism to each other, are faced off and are perfectly round.
3

Drill the barrel. Drill downwards the interior lengthwise to a diameter about 5 thousandths of an inch (0.127 mm) less than the desired finished bore diameter of the barrel. A special drill, known every bit a deep hole drill, must be used to drill the barrel. The deep hole drill volition hold the tungsten carbide drill bit however and spin the barrel to perform the drilling.^[3] Drilling will be liquid cooled and volition go along at about 1 inch (25.4 mm) per minute. Total fourth dimension to drill the pigsty will be about 30 minutes.
4

Ream the barrel. Work a tungsten carbide bore reamer downwardly the finished drill hole of the barrel, using liquid coolant every bit the reamer works. The reamer will expand the hole to the desired finished diameter, and smooth the inner drilled surface of the barrel as it creates the final desired bore.^[4]
5
Rifle the butt. Rifling consists of spiral grooves in the bore, which will impart a spin to the fired round as information technology travels downward the barrel. This spin will gyro stabilize the flying of the fired circular. Determine the number of rifling grooves to exist placed in the bore and the amount of twist to exist put on the rifling grooves. Consult with experts in the field of gun barrel making to determine this information. Observe these experts at specialty gun barrel making shops.
- Make the first rifling groove. Insert a tube mounted with the rifling hook cutter box downwardly the bore of the barrel. Draw the rifling hook cutter box through the diameter while rotating the barrel at a rate recommended by the skillful to requite the desired rifling spin.
- Add more than rifling grooves. Index the barrel to the starting position for the next groove. Draw the rifling hook cutter box through the bore while rotating the barrel at a rate recommended past the proficient to give the desired rifling spin.
- Cease the rifling. Repeat passes through the bore with the rifling claw cutter box as needed.
six
Lap the barrel to fine polish the bore.
- Insert the barrel lapping rod into the diameter until it is about iv inches (101.6 mm) from 1 end of the bore. Pour molten lead into the finish of the bore and let information technology to harden.
- Push the lap out of the barrel. Push button the lapping rod forward until the now solidified pb slug, called the lead lap, is exposed. Cover the lead lap with lapping paste, which is similar to valve grinding paste.
- Consummate the lapping. Run the lead lap up and downwards the length of the barrel about l times, applying more than lapping paste as necessary.

Add New Question

Question

What shape should the chamber be?

Information technology depends on the blazon and quotient of the weapon. The The Sporting Artillery and Ammunition Manufacturers' Constitute (SAAMI) has standardized dimensions for bullet casings and chambers to ensure condom interchangeability of rounds from one manufacturer to the next. For muzzleloading firearms, the bore is typically the same as the butt.
Question

How would a Damascus twist barrel be forged?

Forge a billet to the length that is needed. The barrel will need to be perfectly square. And then, twist the square barracks. Make sure that it's i-4 inches wider than it needs to exist. Then, cool grind to your desired shape, heat treat, and compose.
Question

viii.8 bolts OK for making a butt? Their strength is 21 - 32 HRC.

The Idahoan says yes, but admits he was trying to make a pistol butt using simple tools, equally shown by the roughness of the finished production.