For those who appreciate the utilitarian advantages of a more compact rifle platform, regardless of action type, the process of shortening a barrel demands meticulous attention to detail and precision tooling. Rifleshooter.com recently showcased a detailed account of modifying a Winchester Model 94 30-30, transforming its full-length barrel into a more manageable 18-inch configuration, just forward of the magazine tube. This project necessitated not only a precise barrel cut and crown but also a complete overhaul of the front sighting system, requiring careful alignment and blind hole tapping.
The primary objective was to achieve a specific aesthetic and handling profile, resulting in a finished barrel length just over 18 inches. The original factory front sight ramp, being soldered in place, presented a challenge. Rather than risking significant heat introduction and subsequent refinishing by unsoldering and repositioning the old ramp, the decision was made to install a new screw-on one-piece ramp and front sight from Truglo. This choice, while eliminating the need for soldering, introduced the critical task of accurately drilling and tapping a blind 6-48 hole into the barrel itself.
A significant procedural choice, according to Rifleshooter.com, was to drill and tap the blind hole for the new front sight *before* the barrel was cut. This allowed the gunsmith to leverage the discarded portion of the barrel for secure fixturing in a milling machine vise, utilizing bronze jaws to prevent marring. Proper sight alignment was paramount, with a machinist level used across the receiver's x and y axes to ensure the new front sight would be perfectly perpendicular to the receiver—a crucial step, especially given the common manufacturing issue of canted sights on many lever action rifles, as observed on the original setup of this specific Winchester 94.
The blind hole operation required specific tooling: a spotting drill to prevent bit deflection on the barrel's curved surface, a tap drill, and a bottom tap, which features a minimal taper for threading shallow holes effectively. With the barrel centered using a center finder in the mill, the spotting drill initiated the hole, followed by the tap drill to a precise depth of .125 inches, carefully controlled via the milling machine's digital readout to prevent breakthrough. Tapping the blind 6-48 hole was highlighted as the most delicate step; executed with a new tap, generous tapping compound to manage chips, and delicate finger-tip pressure on the tap holder to avoid the catastrophic risk of tap breakage.
Once the blind hole was meticulously tapped, the barrel was rough-cut with a hacksaw. The final, critical step for accuracy and downrange performance was crowning the muzzle. A Manson Muzzle Crown Resurfacing Kit was employed, comprising arbors that expand within the bore to guide carbide cutters. Driven by a hand tool, this system efficiently eliminated saw marks and established a clean, concentric crown. The project concluded with the application of Loctite to secure the Truglo front sight.
