What are the main steps involved in converting a Winchester 1885 Low Wall from rimfire to centerfire?

The conversion involves plugging the original rimfire firing pin hole, drilling a new centerfire hole, fabricating a new firing pin and a custom link to adjust breech block timing, reshaping the extractor, and reaming the chamber. A safety vent hole is also drilled into the breech block.

Why is a new link necessary for the firing pin timing in this conversion?

A new, longer link is fabricated to raise the breech block, correcting issues where the original firing pin was striking too low on the primer. This ensures reliable ignition with centerfire cartridges.

What safety features are incorporated during the conversion?

A crucial safety feature added is a vent hole drilled into the breech block to safely release gas pressure in case of a pierced primer. The extractor is also modified for the larger cartridge.

How is the durability of the new components ensured?

The newly machined steel link is case-hardened using Kasenit Surface Hardening Compound No. 1. This process makes the surface of the steel significantly harder and more resistant to wear from repeated mechanical operation.

Converting a Winchester 1885 Low Wall from Rimfire to Centerfire | MidwayUSA Gunsmithing

Name: Converting a Winchester 1885 Low Wall from Rimfire to Centerfire | MidwayUSA Gunsmithing
Uploaded: 2013-12-09T21:00:02+00:00
Duration: 8 min 31 s
Channel: MidwayUSA

MidwayUSA

Published on December 9, 2013

Category: Gunsmithing & DIY

Duration: 8:31

This guide details the advanced gunsmithing process of converting a Winchester 1885 Low Wall rifle from .32 Rimfire to .357 Magnum. Expert gunsmith Larry Potterfield demonstrates precise machining techniques, including plugging the old firing pin hole, fabricating a new firing pin and link, and modifying the breech block for safety and proper function. The conversion requires specialized tools and meticulous attention to detail for reliable ignition and safe operation with centerfire cartridges.

Quick Summary

Converting a Winchester 1885 Low Wall from rimfire to centerfire involves precise gunsmithing. Key steps include plugging the original firing pin hole, fabricating a new firing pin and a custom link to correct breech block timing, drilling a safety vent hole, and case hardening critical components for durability.

Chapters

00:00Project Introduction
00:44Plugging the Firing Pin Hole
02:09New Firing Pin Fabrication
03:30Safety Vent and Extractor Modification
04:45Troubleshooting Primer Strikes
05:52Fabricating a New Link
07:28Case Hardening and Final Testing

Frequently Asked Questions

How is the firing pin hole plugged during a rimfire to centerfire conversion on a Winchester 1885 Low Wall?

The original rimfire firing pin hole is plugged by drilling it out, tapping it for an 8x40 screw, installing the screw with Loctite, and then filing it flush with the breech block face for a clean finish.

What modifications are needed to correct low primer strikes after converting a Winchester 1885 Low Wall to centerfire?

Low primer strikes are corrected by raising the breech block, which requires fabricating a new, longer link between the finger lever and the breech block to adjust the timing and ensure proper firing pin engagement.

Why is a vent hole drilled into the breech block during this conversion?

A vent hole is drilled into the breech block to serve as a safety feature, allowing gases to escape safely in the event of a pierced primer, thus protecting the shooter.

What is the purpose of case hardening the new link in the Winchester 1885 conversion?

Case hardening the newly machined steel link using compounds like Kasenit increases its surface hardness and durability, ensuring it can withstand the repeated mechanical stresses of the falling block action over time.

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