Jack Rowe, Master Gunsmith Series, Trigger Pull. Part 2 of 3.

Published on May 30, 2012
Duration: 10:26

Master Gunsmith Jack Rowe provides advanced insights into trigger pull adjustments, focusing on the sear. He advises against altering the hammer bent unless necessary and details the severe mechanical consequences of shortening the sear nose, including reduced striker travel and potential misfires. Rowe demonstrates a precise gunsmithing technique for lengthening an undersized sear by heating and hammering the metal, emphasizing caution and expertise.

Quick Summary

Master Gunsmith Jack Rowe advises against altering the hammer bent unless necessary, emphasizing sear adjustments first. He details how shortening the sear nose can cause misfires by reducing striker travel and mainspring compression. Rowe demonstrates lengthening a sear by heating and hammering it on an anvil.

Chapters

  1. 00:00Hammer Bent Adjustments
  2. 01:31Consequences of Shortening Sear
  3. 03:51Ejector Timing Issues
  4. 05:46Lengthening the Sear Nose

Frequently Asked Questions

What are the risks of shortening a firearm's sear nose?

Shortening the sear nose can lead to significant mechanical problems. It may prevent the hammer from cocking fully, reduce striker travel, and decrease mainspring compression. This ultimately results in a weaker hammer strike and can cause misfires.

How can a gunsmith lengthen a sear nose that is too short?

A gunsmith can lengthen a sear nose by heating the metal to a red glow with a torch. Then, using an anvil and hammer, they carefully shape and extend the nose, typically by about 1/32nd of an inch, to achieve proper engagement.

Can modifying a sear affect ejector timing?

Yes, altering the sear length can disrupt the timing of a firearm's ejector system. In some designs, like certain Webley models, a shortened sear might cause cocking levers to sit higher, leading to premature ejection of live cartridges.

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