This pusher set up allows the reamer to float in the bore and follow what remains of the factory chamber. The reamer is fed with a MT3 blank held in the tailstock. The chamber is now cut with a Manson live pilot reamer. While I normally prefer using the high-speed steel cutter, the carbide does work well.Ī test fit shows the action can screw snugly against the barrel tenon. Comparing the shapes, the carbide tool can cut closer to the shoulder. Since I’m threading against the shoulder, I decided to use a lay down carbide threader (left), instead of the high-speed steel insert threader I normally use (right). The tenon is coated in Dykem and the end chamfered. This cut was made with a 135-degree high-speed steel profile tool. A dial indicator is used to dial the barrel in on the lathe.Ī facing cut is made across the breech end of the barrel with the high-speed steel 135-degree profile tool. Since we only removed the threads from the barrel, the front part of the chamber is still in the barrel. It makes short work of barrels, gives a fairly smooth finish, and does not induce heat into the part. A cold saw is basically a miter box for steel, the one I have uses a special carbide blade. The first step is to remove the old tenon. The shorter Winchester tenon has 1″-16 threads and no counterbore.īarrel tenon’s dimensions in hand, we can start fitting the barrel. The Remington tenon is longer, has 1 1/16″-16 threads and a. The factory Remington barrel tenon (left) compared to the factory Winchester tenon (right). This serves as a check against the dimensions recorded from the factory barrel tenon. The action is also measured with a depth micrometer to check the barrel tenon dimensions. The factory barrel tenon is measured to determine it’s length and headspace.Ī quick check with the thread pitch gauge confirms the threads are 16 teeth per inch. Note the tight fit of the bushing against the barrel.
It grabs the flat bottom of the front of the Winchester action. In this case I am using the Brownells action wrench with the universal jaw.
It is important to make sure the action wrench fits well against the action. The barrel is secured in the vise and an action wrench is used to unscrew the action. The Brownells barrel vise we’ll be using to remove the barrel from this action holds barrels with interchangeable aluminum bushings to match different barrel shank diameters.
The outside of the barrel is coated in rosin to prevent it from rotating in the barrel vise. On this rifle, the threads were soaked in Kroil (a penetrating oil that is an essential item for gunsmithing) for a couple of days to make removal easier.
WINCHESTER MODEL 25 BARREL LENGTH INSTALL
Modifications to a firearm may result in personal injury or death, cause the firearm to not function properly, or malfunction, and cause the firearm to become unsafe.įor use in this project, the following items were ordered from Brownells:Īll lathe work is conducted on a Grizzly gunsmith’s lathe.īefore we can install a new barrel the old one needs to be removed. Failure to do so may void warranties and result in an unsafe firearm and may cause injury or death. and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website.Īny modifications made to a firearm should be made by a licensed gunsmith. The contents of are produced for informational purposes only and should be performed by competent gunsmiths only. Taking a quick look at the barrel and action, it looked like the project would work, so we decided to give it a shot. He didn’t have a new barrel blank, however, he did have an old factory take-off Remington 308 Varmint barrel to install. The mix of the overbore 243 Winchester cartridge, years of competitive use, and high round count resulted in a shot out barrel. The gun spent most of its life serving an across-the-course high power rifle shooter. My friend brought over his post-64 Model 70 243 Winchester rifle. Frowned upon by the pre-64 Model 70 fans for its less refined construction and lack of controlled round feed, the post-64 Model 70s can serve the rifleman well.
These newer Model 70s, known as “post-64” rifles, were produced until 2006. In 1964, Winchester redesigned the rifle and changed it from controlled to push feed. The two most notable features of the original Model 70 were it’s three position safety and non-rotating controlled round feed extractor. Originally introduced in 1936, the Winchester Model 70 is an icon of the American rifle market.
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